Properties of the Number 22657

Twenty-Two Thousand Six Hundred Fifty-Seven

Basics

Value: 22656 → 22657 → 22658

Parity: odd

Prime: No

Previous Prime: 22651

Next Prime: 22669

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 139 × 163

Divisors: 1, 139, 163, 22657

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100010000001

Octal: 54201

Duodecimal: 11141

Hexadecimal: 5881

Square: 513339649

Square Root: 150.52242357868147

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

Semiprimes whose prime factors are of equal binary length and which differ from each other in exactly two bit positions. A261074

Triangle read by rows: T(n,k) is the number of unlabeled connected multigraphs with n edges on k nodes, no cut-points and degree >= 3 at each node, loops allowed, n >= 2, 1 <= k <= floor(2·n/3). A360870

Expansion of g.f. A(x) satisfying ∑_n>=0 ∏_k=1..n (x^2·k-1 + A(x)) = ∏_k>=1 (1 - x^2·k) * (1 + x^k + A(x))² / (1 + x^2·k + A(x))². A370344

Expansion of e.g.f. exp(4*(exp(x) - 1) - 3·x). A367921

a(n) = floor( a(n-1)/a(1) + a(n-3)/a(3) + a(n-5)/a(5) + ... ), for n >= 3 with a(1) = 1 and a(2) = 3. A22877

Numbers whose set of base-12 digits is {1,4}. A32824

a(n) = n-th prime number·n-th lucky number. A32601

Expansion of ∏_m>=1 (1+m·q^m)²⁹. A22657

Number of nX4 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 0,1,1,0,0 for x=0,1,2,3,4. A197313