We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. For more information, please review our cookie policy and privacy policy.
By choosing I Accept, you consent to our use of cookies and other tracking technologies.


Number 161 (one hundred sixty-one) is an odd three-digits composite number and natural number following 160 and preceding 162.

Properties of the number 161

Cardinalone hundred sixty-one
one hundred sixty-one
Number of digits3
Sum of digits8
Product of digits6
Number parityOdd
Calculation was done in 0.0000410080 seconds

Prime Factorization of 161

Prime factorization7 x 23
Prime factors7, 23
Number of distinct prime factors ω(n)2
Total number of prime factors Ω(n)2
Sum of prime factors30
Product of prime factors161
Calculation was done in 0.0000069141 seconds

Divisors of 161

List of proper divisors 1, 7, 23
List of all dividers1, 7, 23, 161
Number of divisors d(n)4
Sum of all divisors σ(n)192
Aliquot sum 31
161 is a deficient number , since it is larger than the sum of its proper divisors (31). Its deficiency is 130.
Calculation was done in 0.0000119209 seconds

Prime numbers

Is 161 a prime number?No
Is 161 a semiprime number?Yes
Is 161 a Chen prime number?No
Is 161 a Mersenne prime number?No
Calculation was done in 0.0000979900 seconds


Is 161 a Catalan number?No
Is 161 a Fibonacci number?No
Is 161 a Idoneal number?No
Calculation was done in 0.0000040531 seconds

Number theory

Number theory is a branch of pure mathematics devoted primarily to the study of the integers and integer-valued functions.
161 is not a Happy number
161 is not a Humble number
161 is not a Münchhausen number
161 is not a Perfect number
161 is not a Perfect square
161 is a Palindrome
Calculation was done in 0.0052580833 seconds

Numeric Bases of 161

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.
Calculation was done in 0.0000169277 seconds

Mathematical operations

Mathematical operations are actions that are performed on numbers or mathematical expressions to find a numerical result.
Square of 161 (n2)25921
Cube of 161 (n3)4173281
Square root of 16112.68857754045
Natural Logarithm (ln) of 1615.0814043649845
Decimal Logarithm (log) of 1612.2068258760318
Calculation was done in 0.0000050068 seconds


Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 161-0.70240778557737
Cosecant of 161-1.4236744246478
Cosine of 161-0.71177475563572
Secant of 161-1.4049388406686
Tangent of 1610.98683997994564
Cotangent of 1611.0133355157085
Calculation was done in 0.0000250340 seconds

Number parity

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

Is 161 an Even Number?


Is 161 an Odd Number?

Yes, the number 161 is an odd number.
Total number of all odd numbers from 1 to 161 is 81
Sum of all the odd numbers from 1 to 161 are 6561
The sum of all odd numbers is a perfect square: 6561 = 81
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.
Calculation was done in 0.0000071526 seconds

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 161 in words is "one hundred sixty-one", meaning that:
161 is an aban number (a number without the letter a)
161 is not an eban number (as it contains the letter e)
161 is not an iban number (as it contains the letter i)
161 is not an oban number (as it contains the letter o)
161 is not a tban number (as it contains the letter t)
161 is not an uban number (as it contains the letter u)
Calculation was done in 0.0000019073 seconds

Numeral systems

How to write 161 in other number systems?
Bengali numerals১৬১
Eastern Arabic numerals١٦١
Hieroglyphs numeralsused in Ancient Egypt𓍢𓎋𓏺
Khmer numerals១៦១
Japanese numerals百六十一
Roman numeralsCLXI
Thai numerals๑๖๑
Calculation was done in 0.0001029968 seconds


How do you say 161 in 38 different languages?
Arabicمائة و واحد و ستون
Croatiansto šezdeset i jedan
Czechsto šedesát jeden
Danish et hundrede en og tres
Estonianalafa ɖeka blaade vɔ ɖekɛ
Filipinoisáng daán at anim na pû’t isá
Frenchcent soixante et un
Greekεκατόν εξήντα ένα
Hebrewמאה שישים ואחת
Hindiएक सौ इकसठ
Icelandiceitt­hundrað og sextíu og einn
Indonesianseratus enam puluh satu
Latviansimt sešdesmit viens
Lithuanianšimtas šešiasdešimt vienas
Norwegianhundre og seksti­én
Persianصد و شصت و یک
Polishsto sześćdziesiąt jeden
Portuguesecento e sessenta e um
Romanianuna sută şasezeci şi unu
Russianсто шестьдесят один
Serbianсто шездесет и један
Slovakjedna­sto šesťdesiat­jeden
Slovenesto šestdeset ena
Spanish ciento sesenta y uno
Swahilimia moja na sitini na moja
Turkishyüz altmış bir
Ukrainianсто шістдесят один
Vietnamesemột trăm sáu mươi mốt
Calculation was done in 0.0166950226 seconds


Number 161 reversed161
ASCII Code161¡
Unicode CharacterU+00A1¡
Hexadecimal color (shorthand)#116611
Unix TimestampThu, 01 Jan 1970 00:02:41 +0000
Calculation was done in 0.0000321865 seconds
This page was generated in 0.03 seconds.