15 (number)

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14 15 16
Cardinalfifteen
Ordinal15th
(fifteenth)
Factorization3 · 5
Divisors1, 3, 5, 15
Roman numeralXV
Binary11112
Ternary1203
Quaternary334
Quinary305
Senary236
Octal178
Duodecimal1312
HexadecimalF16
VigesimalF20
Base 36F36
Hebrewט"ו (Tet Vav)

Fifteen is a number. It is between fourteen and sixteen, and is an odd number. It is divisible by 1, 3, 5, and 15.

In Roman numerals, 15 is written as XV.