15
Number 15 (fifteen) is an odd two-digits composite number and natural number following 14 and preceding 16.
Nominal | 15 |
Cardinal | fifteen |
Ordinal | 15th |
Number of digits | 2 |
Sum of digits | 6 |
Product of digits | 5 |
Number parity | Odd |
Calculation was done in 0.0000369549 seconds
Prime factorization | 3 x 5 |
Prime factors | 3, 5 |
Number of distinct prime factors ω(n) | 2 |
Total number of prime factors Ω(n) | 2 |
Sum of prime factors | 8 |
Product of prime factors | 15 |
Calculation was done in 0.0000088215 seconds
List of proper divisors | 1, 3, 5 |
List of all dividers | 1, 3, 5, 15 |
Number of divisors d(n) | 4 |
Sum of all divisors σ(n) | 24 |
Aliquot sum | 9 |
15 is a deficient number , since it is larger than the sum of its proper divisors (9). Its deficiency is 6. |
Calculation was done in 0.0000259876 seconds
Is 15 a prime number? | No |
Is 15 a semiprime number? | Yes |
Is 15 a Chen prime number? | No |
Is 15 a Mersenne prime number? | No |
Calculation was done in 0.0000109673 seconds
Is 15 a Catalan number? | No |
Is 15 a Fibonacci number? | No |
Is 15 a Idoneal number? | Yes: I12 |
Calculation was done in 0.0000050068 seconds
15 is not a Happy number |
15 is a Humble number |
15 is not a Münchhausen number |
15 is not a Perfect number |
15 is not a Perfect square |
15 is not a Palindrome |
Calculation was done in 0.0053009987 seconds
Base | System | Value |
---|
2 | Binary | 11112 |
3 | Ternary | 1203 |
4 | Quaternary | 334 |
5 | Quinary | 305 |
6 | Senary | 236 |
7 | Septenary | 217 |
8 | Octal | 178 |
9 | Nonary | 169 |
10 | Decimal | 15 |
12 | Duodecimal | 1312 |
16 | Hexadecimal | f16 |
20 | Vigesimal | f20 |
36 | Base36 | f36 |
60 | Sexagesimal | F60 |
Calculation was done in 0.0000159740 seconds
Square of 15 (n2) | 225 |
Cube of 15 (n3) | 3375 |
Square root of 15 | 3.8729833462074 |
Natural Logarithm (ln) of 15 | 2.7080502011022 |
Decimal Logarithm (log) of 15 | 1.1760912590557 |
Calculation was done in 0.0000040531 seconds
Sine of 15 | 0.65028784015712 |
Cosecant of 15 | 1.5377805615409 |
Cosine of 15 | -0.75968791285882 |
Secant of 15 | -1.3163300127244 |
Tangent of 15 | -0.85599340090852 |
Cotangent of 15 | -1.1682333052318 |
Calculation was done in 0.0000100136 seconds
Is 15 an Odd Number?
Yes, the number 15 is an odd number.
Total number of all odd numbers from 1 to 15 is
8Sum of all the odd numbers from 1 to 15 are
64The sum of all odd numbers is a perfect square: 64 = 8
An odd number is any integer (a whole number) that cannot be divided by 2 evenly. Odd numbers are the opposite of even numbers.Previous odd number is
13
Calculation was done in 0.0000050068 seconds
The spelling of 15 in words is "fifteen", meaning that: |
15 is an aban number (a number without the letter a) |
15 is not an eban number (as it contains the letter e) |
15 is not an iban number (as it contains the letter i) |
15 is an oban number (a number without the letter o) |
15 is not a tban number (as it contains the letter t) |
15 is an uban number (a number without the letter u) |
Calculation was done in 0.0000021458 seconds
Bengali numerals | ১৫ |
Eastern Arabic numerals | ١٥ |
Hieroglyphs numeralsused in Ancient Egypt | 𓎆𓏾 |
Khmer numerals | ១៥ |
Japanese numerals | 十五 |
Roman numerals | XV |
Thai numerals | ๑๕ |
Calculation was done in 0.0000679493 seconds
Arabic | خمسة عشر |
Croatian | petnaest |
Czech | patnáct |
Danish | femten |
Dutch | vijftien |
Estonian | wuiatɔ̃ |
Faroese | fímtan |
Filipino | labíng-limá |
Finnish | viisitoista |
French | quinze |
Greek | δεκαπέντε |
German | fünfzehn |
Hebrew | חמש עשרה |
Hindi | पन्द्रह |
Hungarian | tizenöt |
Icelandic | fimmtán |
Indonesian | lima belas |
Italian | quindici |
Japanese | 十五 |
Korean | 십오 |
Latvian | piecpadsmit |
Lithuanian | penkiolika |
Norwegian | femten |
Persian | پانزده |
Polish | piętnaście |
Portuguese | quinze |
Romanian | cincisprezece |
Russian | пятнадцать |
Serbian | петнаест |
Slovak | pätnásť |
Slovene | petnajst |
Spanish | quince |
Swahili | kumi na tano |
Swedish | femton |
Thai | สิบห้า |
Turkish | on beş |
Ukrainian | пʼятнадцять |
Vietnamese | mười lăm |
Calculation was done in 0.0137619972 seconds
Number 15 reversed | 51 |
ASCII Code | 15 | |
Unicode Character | U+000F | |
Unix Timestamp | Thu, 01 Jan 1970 00:00:15 +0000 |
Calculation was done in 0.0000350475 seconds
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