Names of 15
| Nominal | 15 |
| Cardinal | fifteen |
| Ordinal | 15th |
| This number as US currency | fifteen dollars |
| Is 15 an odd number? | 15 is an odd number |
| Is 15 an even number? | 15 is NOT an even number |
| Is 15 a palindrome? | 15 is NOT a palindrome number |
| Is 15 a triangle number? | 15 is a triangle number |
15 in other Bases
| Base 2 (Binary) | 11112 |
| Base 3 (Ternary) | 1203 |
| Base 4 (Quaternary) | 334 |
| Base 5 (Quinary) | 305 |
| Base 6 (Senary) | 236 |
| Base 8 (Octal) | 178 |
| Base 12 (Duodecimal) | 1312 |
| Base 16 (Hexadecimal) | F16 |
| Base 20 (Vigesimal) | F20 |
Primes and Factors tests for 15
| Is 15 a Prime Number? | 15 is NOT a prime |
| Is 15 a perfect number? | 15 is NOT a perfect number |
| Is 15 a Mersenne Prime? | 15 is NOT a Mersenne prime |
| Is 15 a Fermat Prime? | 15 is NOT a Fermat prime |
| Is 15 a Fibonacci Prime? | 15 is NOT a Fibonacci prime |
| Is 15 a Partition Prime? | 15 is NOT a Partition prime |
| Is 15 a Pell Prime? | 15 is NOT a Pell prime |
| Prime Factors | Prime factors of 15 |
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15 in other Numerals
| 15 in Roman Numeral | XV |
| 15 in Chinese Numeral | 壹拾伍 |
| 15 in Egyptian Numeral | 𓎆𓏾 |
| 15 in Babylonian Numeral |  |
Roots and stuff for 15
| Is 15 a square number? | 15 is NOT a square number |
| Is 15 a cube number? | 15 is NOT a cube number |
| Square root of the number 15 | 3.8729833462074 |
| Cube root of the number 15 | 2.4662120743305 |
Recreational math for 15
| Number 15 reversed | 51 |
| Sum of the digits | 6 |
| No of digits | 2 |