Properties of the Number 22457

Twenty-Two Thousand Four Hundred Fifty-Seven

Basics

Value: 22456 → 22457 → 22458

Parity: odd

Prime: No

Previous Prime: 22453

Next Prime: 22469

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 17 × 1321

Divisors: 1, 17, 1321, 22457

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101011110111001

Octal: 53671

Duodecimal: 10BB5

Hexadecimal: 57b9

Square: 504316849

Square Root: 149.85659811966906

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 k, k+2, k+4, k+6, k+8, k+10 are semiprimes. A92128

Expansion of e.g.f. sinh(2 * (exp(x)-1)) / 2. A357598

Positive numbers y such that y² is of the form x²+(x+617)² with integer x. A160176

a(n) = ∑_k=0..n (k·n+1)^n-k * binomial(n,k). A356811

G.f.: A(x) = x/(1-x) o x/(1-x²) o x/(1-x⁴) o x/(1-x⁸) o..., composition of functions x/(1 - x^2ⁿ) for n=0,1,2,3,... A136752

Number of (w,x,y,z) with all terms in {1,...,n} and w+x=|x-y|+|y-z|. A212676

a(n) = ∑_k=2..n-1 k·A259698(n,k). A259700

Number of permutations of length n avoiding 12345 and containing exactly 1 occurrence of 12354. A224296

The lowest positive-integer center for a square spiral whose center lies in an n X n square of nonprimes. A358720

Expansion of e.g.f. exp(2·x) / (1 - x·exp(3·x)). A368293