Properties of the Number 81156

Eighty-One Thousand One Hundred Fifty-Six

Basics

Value: 81155 → 81156 → 81157

Parity: even

Prime: No

Previous Prime: 81131

Next Prime: 81157

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 6763

Divisors: 1, 2, 3, 4, 6, 12, 6763, 13526, 20289, 27052

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011110100000100

Octal: 236404

Duodecimal: 3AB70

Hexadecimal: 13d04

Square: 6586296336

Square Root: 284.87892164918065

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

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

a(n) = ∑_k=0..n p(k) where p(k) = number of partitions of k (A000041). A70

Numbers k such that 133·2^k+1 is prime. A32416

Number of odd cycles in range [A014137(2n)..A014138(2n)] of permutation A057505/A057506, with fixed-points of both A057163 and A057164. A81156