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Number 155 (one hundred fifty-five) is an odd three-digits composite number and natural number following 154 and preceding 156.

Properties of the number 155

Cardinalone hundred fifty-five
one hundred fifty-five
Number of digits3
Sum of digits11
Product of digits25
Number parityOdd
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Prime Factorization of 155

Prime factorization5 x 31
Prime factors5, 31
Number of distinct prime factors ω(n)2
Total number of prime factors Ω(n)2
Sum of prime factors36
Product of prime factors155
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Divisors of 155

List of proper divisors 1, 5, 31
List of all dividers1, 5, 31, 155
Number of divisors d(n)4
Sum of all divisors σ(n)192
Aliquot sum 37
155 is a deficient number , since it is larger than the sum of its proper divisors (37). Its deficiency is 118.
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Prime numbers

Is 155 a prime number?No
Is 155 a semiprime number?Yes
Is 155 a Chen prime number?No
Is 155 a Mersenne prime number?No
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Is 155 a Catalan number?No
Is 155 a Fibonacci number?No
Is 155 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.
155 is not a Happy number
155 is not a Humble number
155 is not a Münchhausen number
155 is not a Perfect number
155 is not a Perfect square
155 is not a Palindrome
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Numeric Bases of 155

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.
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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 155 (n2)24025
Cube of 155 (n3)3723875
Square root of 15512.449899597989
Natural Logarithm (ln) of 1555.0434251169192
Decimal Logarithm (log) of 1552.1903316981703
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Trigonometry is the study of the relationship between the angles and sides of a triangle.
Sine of 155-0.87331198277465
Cosecant of 155-1.1450661616057
Cosine of 155-0.48716134980334
Secant of 155-2.0527079999341
Tangent of 1551.7926544934798
Cotangent of 1550.55783197690195
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Number parity

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

Is 155 an Even Number?


Is 155 an Odd Number?

Yes, the number 155 is an odd number.
Total number of all odd numbers from 1 to 155 is 78
Sum of all the odd numbers from 1 to 155 are 6084
The sum of all odd numbers is a perfect square: 6084 = 78
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 155 in words is "one hundred fifty-five", meaning that:
155 is an aban number (a number without the letter a)
155 is not an eban number (as it contains the letter e)
155 is not an iban number (as it contains the letter i)
155 is not an oban number (as it contains the letter o)
155 is not a tban number (as it contains the letter t)
155 is not an uban number (as it contains the letter u)
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Numeral systems

How to write 155 in other number systems?
Bengali numerals১৫৫
Eastern Arabic numerals١٥٥
Hieroglyphs numeralsused in Ancient Egypt𓍢𓎊𓏾
Khmer numerals១៥៥
Japanese numerals百五十五
Roman numeralsCLV
Thai numerals๑๕๕
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How do you say 155 in 38 different languages?
Arabicمائة و خمسة و خمسون
Croatiansto pedeset i pet
Czechsto padesát pět
Danish et hundrede fem og halvtreds
Estonianalafa ɖeka blaatɔ̃ vɔ atɔ̃
Filipinoisáng daán at limáng pû’t limá
Frenchcent cinquante-cinq
Greekεκατόν πενήντα πέντε
Hebrewמאה חמישים וחמש
Hindiएक सौ पचपन
Icelandiceitt­hundrað og fimmtíu og fimm
Indonesianseratus lima puluh lima
Latviansimt piecdesmit pieci
Lithuanianšimtas penkiasdešimt penki
Norwegianhundre og femti­fem
Persianصد و پنجاه و پنج
Polishsto pięćdziesiąt pięć
Portuguesecento e cinquenta e cinco
Romanianuna sută cincizeci şi cinci
Russianсто пятьдесят пять
Serbianсто педесет и пет
Slovakjedna­sto päťdesiat­päť
Slovenesto petdeset pet
Spanish ciento cincuenta y cinco
Swahilimia moja na hamsini na tano
Turkishyüz elli beş
Ukrainianсто пʼятдесят пʼять
Vietnamesemột trăm năm mươi lăm
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Number 155 reversed551
ASCII Code155
Unicode CharacterU+009B
Hexadecimal color (shorthand)#115555
Unix TimestampThu, 01 Jan 1970 00:02:35 +0000
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