Number 15

Interestingness: 15 · Rank #26 of 1000

Visual representations

Binary image (n×n bits)
Element P – Phosphorus
Triangular · P3(5) = 15
Hexagonal · P6(3) = 15
35
Prime factorization

Representations of 15

Greek numeral
ιεʹ
Sanskrit numeral
१५
Arabic numeral
١٥
Roman numeral
XV
Maya numeral
▃▃▃▃▃
▃▃▃▃▃
▃▃▃▃▃
Chinese numeral
十五
Hebrew numeral
טו
Egyptian numeral
𓎆
𓏹𓏹𓏹𓏹𓏹
Morse code
.----.....

15 in different numeral systems

Binary
1111
Base-3
120
Base-4
33
Base-5
30
Base-6
23
Base-7
21
Base-8
17
Duodecimal
13
Hex
f
Vigesimal
f
Base-24
f
Base-36
f
Negabinary
10011

Factorization

Prime factors: 3, 5
Divisors: 1, 3, 5, 15
Sum of divisors other than 15: 9
Product of prime factors: 15 = 3 × 5

Number-theory characteristics (9)

Triangular Hexagonal Difference of 2 squares Evil number Mersenne Odd Ones-Zeroes Composite Deficient

Base-10 digit properties (1)

These depend on the decimal representation of the number.

Zuckerman number

Related primes

Number 15 prime
Prime number before 15
Prime number after 15