Properties of the Number 22805

Twenty-Two Thousand Eight Hundred Five

Basics

Value: 22804 → 22805 → 22806

Parity: odd

Prime: No

Previous Prime: 22787

Next Prime: 22807

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 4561

Divisors: 1, 5, 4561, 22805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100100010101

Octal: 54425

Duodecimal: 11245

Hexadecimal: 5915

Square: 520068025

Square Root: 151.0132444522665

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

Beach-Williams Pell numbers of type k² + 4. A212083

Partial sums of ∑_k=1..n n/gcd(n,k), or partial sums of ∑_d∣n d*φ(d) (see A057660). A174405

Members of 3-cycles of permutation A111273. A113701

Numbers n where τ(n) and n-τ(n) are perfect squares, with τ(n) the number of divisors of n (A000005). A245197

a(n) = T(2n,n+3), T given by A026725. A26843

Position where n (presumably) appears the last time in A107261, or 0 if n keeps appearing. A107262

a(n) = prime(1)² + prime(n)². A287922

Numbers k such that k and k² use only the digits 0, 2, 5, 6 and 8. A136913

Numbers n such that 36n+11, 36(n+1)+11, 36(n+2)+11 and 36(n+3)+11 are prime. A255608

Numbers having in binary representation more zeros than their squares. A293655