Properties of the Number 81501

Eighty-One Thousand Five Hundred One

Basics

Value: 81500 → 81501 → 81502

Parity: odd

Prime: No

Previous Prime: 81463

Next Prime: 81509

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 3881

Divisors: 1, 3, 7, 21, 3881, 11643, 27167, 81501

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111001011101

Octal: 237135

Duodecimal: 3B1B9

Hexadecimal: 13e5d

Square: 6642413001

Square Root: 285.48379989064176

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 ∏_n>=1 (1 - x^6·n)/(1 - xⁿ)⁶ in powers of x. A277283

Number of idempotent binary relation matrices E on [n] such that E contains an identity matrix of order n-1 and (E - I_n)² = 0. A360743

a(n) = row sum of triangle whose n-th row begins with n and contains n-1 smallest numbers coprime to n and greater than n. A81501