15 (number)

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14 15 16
Cardinal fifteen
Ordinal 15th
(fifteenth)
Factorization 3 · 5
Divisors 1, 3, 5, 15
Roman numeral XV
Binary 11112
Ternary 1203
Quaternary 334
Quinary 305
Senary 236
Octal 178
Duodecimal 1312
Hexadecimal F16
Vigesimal F20
Base 36 F36
Hebrew ט"ו (Tet Vav)

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

In Roman numerals, 15 is written as XV.