Properties of the Number 81356

Eighty-One Thousand Three Hundred Fifty-Six

Basics

Value: 81355 → 81356 → 81357

Parity: even

Prime: No

Previous Prime: 81353

Next Prime: 81359

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 11 × 43 ²

Divisors: 1, 2, 4, 11, 22, 43, 44, 86, 172, 473

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011110111001100

Octal: 236714

Duodecimal: 3B0B8

Hexadecimal: 13dcc

Square: 6618798736

Square Root: 285.2297319705644

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 g.f.: (1+x)/(1-43·x). A170763

Minimal m > 0 such that Fibonacci(m) == 0 (mod n³). A132633

a(n) = p³ + p² where p = prime(n). A135178

Starting positions of strings of four 7's in the decimal expansion of π. A83632

a(1) = 1; for n > 1, a(n) = (n-1)*(n-2)^A000120(n-1 - 1). A392466

Growth series for fundamental group of orientable closed surface of genus 11. A63821

Number of reduced words of length n in Coxeter group on 44 generators S_i with relations (S_i)² = (S_i S_j)⁴ = I. A163230

Number of reduced words of length n in Coxeter group on 44 generators S_i with relations (S_i)² = (S_i S_j)⁵ = I. A163748

Number of reduced words of length n in Coxeter group on 44 generators S_i with relations (S_i)² = (S_i S_j)⁶ = I. A164277

Number of reduced words of length n in Coxeter group on 44 generators S_i with relations (S_i)² = (S_i S_j)¹⁰ = I. A166254