Properties of the Number 81912

Eighty-One Thousand Nine Hundred Twelve

Basics

Value: 81911 → 81912 → 81913

Parity: even

Prime: No

Previous Prime: 81901

Next Prime: 81919

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 3413

Divisors: 1, 2, 3, 4, 6, 8, 12, 24, 3413, 6826

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111111111000

Octal: 237770

Duodecimal: 3B4A0

Hexadecimal: 13ff8

Square: 6709575744

Square Root: 286.2027253539002

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

Expansion of (1-x+8x²)/((1-x)(1-2x)) . A154252

Number of compositions of n such that the smallest part has multiplicity five. A241865

Glaisher's function T(2n+1). A2608

a(n) = 6ⁿ*(n² - n + 72)/72. A81912