Properties of the Number 81675

Eighty-One Thousand Six Hundred Seventy-Five

Basics

Value: 81674 → 81675 → 81676

Parity: odd

Prime: No

Previous Prime: 81671

Next Prime: 81677

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 ² × 11 ²

Divisors: 1, 3, 5, 9, 11, 15, 25, 27, 33, 45

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111100001011

Octal: 237413

Duodecimal: 3B323

Hexadecimal: 13f0b

Square: 6670805625

Square Root: 285.78838324886476

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

Numbers k such that both k and k+1 are abundant. A96399

a(n) = (n+1)²*(n+2)²*(n+3)²*(n+4)/144. A108647

Numbers of the form p³*q²*r² where p, q, and r are distinct primes. A179695

a(n) is the number of walks from (0,0) to (0,3) that remain in the upper half-plane y >= 0 using 2·n +1 unit steps either up (U), down (D), left (L) or right (R). A145602

Number of walks on square lattice. Column y=3 of A052174. A5561

a(n) = n*(2·n+1)². A84367

Numbers k such that both σ(k) >= 2·k-1 and σ(k+1) >= 2*(k+1)-1. A103289

Triangular array of generalized Narayana numbers: T(n, k) = 4·binomial(n+1, k+3)*binomial(n+1, k-1)/(n+1). A145598

Table of generalized de Bruijn's numbers (A006480) read by ascending antidiagonals. A361027

Numbers k such that both k and k+1 are Zumkeller numbers (A083207). A328327