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# 221

Number 221 (two hundred twenty-one) is an odd three-digits composite number and natural number following 220 and preceding 222.

## Properties of the number 221

 Nominal 221 Cardinal two hundred twenty-one Cardinaltwo hundred twenty-one Ordinal 221st Number of digits 3 Sum of digits 5 Product of digits 4 Number parity Odd
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## Prime Factorization of 221

 Prime factorization 13 x 17 Prime factors 13, 17 Number of distinct prime factors ω(n) 2 Total number of prime factors Ω(n) 2 Sum of prime factors 30 Product of prime factors 221
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## Divisors of 221

 List of proper divisors 1, 13, 17 List of all dividers 1, 13, 17, 221 Number of divisors d(n) 4 Sum of all divisors σ(n) 252 Aliquot sum 31 221 is a deficient number , since it is larger than the sum of its proper divisors (31). Its deficiency is 190.
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## Prime numbers

 Is 221 a prime number? No Is 221 a semiprime number? Yes Is 221 a Chen prime number? No Is 221 a Mersenne prime number? No
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## Sequences

 Is 221 a Catalan number? No Is 221 a Fibonacci number? No Is 221 a Idoneal number? No
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## Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
 221 is not a Happy number 221 is not a Humble number 221 is not a Münchhausen number 221 is not a Perfect number 221 is not a Perfect square 221 is not a Palindrome
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## Numeric Bases of 221

In mathematics, a base or radix of a numeral system is the number of unique digits, including zero, used to represent numbers in that system.
BaseSystemValue
2Binary110111012
3Ternary220123
4Quaternary31314
5Quinary13415
6Senary10056
7Septenary4347
8Octal3358
9Nonary2659
10Decimal221
12Duodecimal16512
20Vigesimalb120
36Base366536
60Sexagesimal3f60
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## Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
 Square of 221 (n2) 48841 Cube of 221 (n3) 1.07939e+07 Square root of 221 14.8661 Natural Logarithm (ln) of 221 5.39816 Decimal Logarithm (log) of 221 2.34439
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## Trigonometry

Trigonometry is the study of the relationship between the angles and sides of a triangle.
 Sine of 221 0.885939 Cosecant of 221 1.12875 Cosine of 221 0.463802 Secant of 221 2.15609 Tangent of 221 1.91017 Cotangent of 221 0.523515
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## Number parity

Parity is the property of an integer of whether it is even or odd.

No

### Is 221 an Odd Number?

Yes, the number 221 is an odd number.
Total number of all odd numbers from 1 to 221 is 111
Sum of all the odd numbers from 1 to 221 are 12321
The sum of all odd numbers is a perfect square: 12321 = 111
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
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## Ban number

In recreational mathematics, a ban number is a number that does not contain a particular letter when spelled out in English; in other words, the letter is "banned".
 The spelling of 221 in words is "two hundred twenty-one", meaning that: 221 is an aban number (a number without the letter a) 221 is not an eban number (as it contains the letter e) 221 is an iban number (a number without the letter i) 221 is not an oban number (as it contains the letter o) 221 is not a tban number (as it contains the letter t) 221 is not an uban number (as it contains the letter u)
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## Numeral systems

How to write 221 in other number systems?
 Bengali numerals ২২১ Eastern Arabic numerals ٢٢١ Hieroglyphs numeralsused in Ancient Egypt 𓍣𓎇𓏺 Khmer numerals ២២១ Japanese numerals 二百二十一 Roman numerals CCXXI Thai numerals ๒๒๑
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## Translation

How do you say 221 in 38 different languages?
 Arabic مائتان و واحد و عشرون Croatian dvjesto dvadeset i jedan Czech dvě stě dvacet jeden Danish to hundrede en og tyve Dutch tweehonderdéénentwintig Estonian alafa eve blaeve vɔ ɖekɛ Faroese tvey­hundrað­og­tjúgo­ein Filipino dalawáng daán at dalawáng pû’t isá Finnish kaksi­sataa­kaksi­kymmentä­yksi French deux cent vingt et un Greek διακόσια είκοσι ένα German zwei­hundert­ein­und­zwanzig Hebrew מאתיים עשרים ואחת Hindi दो सौ इक्कीस Hungarian két­száz­huszon­egy Icelandic tvö­hundrað og tuttugu og einn Indonesian dua ratus dua puluh satu Italian duecentoventuno Japanese 二百二十一 Korean 이백이십일 Latvian divsimt divdesmit viens Lithuanian du šimtai dvidešimt vienas Norwegian to hundre og tjue­én Persian دویست و بیست و یک Polish dwieście dwadzieścia jeden Portuguese duzentos e vinte e um Romanian două sute douăzeci şi unu Russian двести двадцать один Serbian двеста двадесет и један Slovak dve­sto dvadsať­jeden Slovene dvjesto dvaset ena Spanish doscientos veintiuno Swahili mia mbili na ishirini na moja Swedish tvåhundratjugoen Thai สอง​ร้อย​ยี่​สิบ​เอ็ด Turkish iki yüz yirmi bir Ukrainian двісті двадцять один Vietnamese hai trăm hai mươi mốt
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## Miscellaneous

 Number 221 reversed 122 ASCII Code 221 Ý Unicode Character U+00DD Ý Hexadecimal color (shorthand) #222211 Unix Timestamp Thu, 01 Jan 1970 00:03:41 +0000
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