Properties of the Number 80731

Eighty Thousand Seven Hundred Thirty-One

Basics

Value: 80730 → 80731 → 80732

Parity: odd

Prime: No

Previous Prime: 80713

Next Prime: 80737

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 × 19 × 607

Divisors: 1, 7, 19, 133, 607, 4249, 11533, 80731

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011101101011011

Octal: 235533

Duodecimal: 3A877

Hexadecimal: 13b5b

Square: 6517494361

Square Root: 284.13201157208596

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

Inverse Moebius transform of 5-simplex numbers A000389. A101289

A binomial recursion: a(n) = q(n) (see formula). A135150

a(n) = binomial(n + 4, n - 1) + 1. A323228

Expansion of (1-x)/(1-x+x²-2·x³). A78015

Even-indexed coefficients related to Kirchhoff index of hexagonal (benzene) chains. A137195

Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, vertical, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-2. A211911

a(1)=1; a(2)=6; for n > 2, a(n) is taken as the smallest positive integer greater than a(n-1) such that the condition "n is a member of the sequence if and only if a(n) is odd" is satisfied. A80731