Properties of the Number 15

Fifteen

Basics

Value: 14 → 15 → 16

Parity: odd

Prime: No

Previous Prime: 13

Next Prime: 17

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 3 × 5

Divisors: 1, 3, 5, 15

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1111

Octal: 17

Duodecimal: 13

Hexadecimal: f

Square: 225

Square Root: 3.872983346207417

Classification

Fibonacci: No

Bell Number: Yes

Factorial Number: No

Regular Number: Yes

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

No sequences found.