Properties of the Number 22445

Twenty-Two Thousand Four Hundred Forty-Five

Basics

Value: 22444 → 22445 → 22446

Parity: odd

Prime: No

Previous Prime: 22441

Next Prime: 22447

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 5 × 67 ²

Divisors: 1, 5, 67, 335, 4489, 22445

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011110101101

Octal: 53655

Duodecimal: 10BA5

Hexadecimal: 57ad

Square: 503778025

Square Root: 149.81655449248592

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 σ(k) = ψ(k) + τ(k). A387953

Triangle T(n,k), 0<=k<=n, read by rows; given by [0, 1, 0, 2, 0, 3, 0, 4, 0, 5, 0, ...] δ [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, ...] where δ is the operator defined in A084938. A94456

a(n) = floor(2*(3/2)ⁿ). A147788

a(n) = round(2*(3/2)ⁿ), using round-to-even method. A147789

Numbers p²*q, p > q odd primes such that q does not divide p-1, and q does not divide p+1. A350421

Numbers k such that p² divides k, where p = A006530(k), the largest prime factor of k, and σ(k) does not have any prime factor larger than p. A336354

Trajectory of 3 under map n->39n+1 if n odd, n->n/2 if n even. A37117

a(n) = 1 + ∑_k=0..n-2 binomial(n-2,k) * a(k) * a(n-k-2). A337187

Number of self-avoiding closed walks (from 0 to 0) of length 2n in the strip {0, 1, 2} X Z of the square lattice Z X Z. A22445