Properties of the Number 25531

Twenty-Five Thousand Five Hundred Thirty-One

Basics

Value: 25530 → 25531 → 25532

Parity: odd

Prime: No

Previous Prime: 25523

Next Prime: 25537

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 11 ² × 211

Divisors: 1, 11, 121, 211, 2321, 25531

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110001110111011

Octal: 61673

Duodecimal: 12937

Hexadecimal: 63bb

Square: 651831961

Square Root: 159.78422950967345

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

Number of polygons formed when every pair of vertices of a regular n-gon are joined by an infinite line. A344857

Number of independent vertex sets of the n X n torus grid graph. A27683

a(n) = 5·a(n-1) - 2·a(n-2) for n>1, with a(0) = 1, a(1) = 3. A52984

a(n) = 5·a(n-2) - 2·a(n-4), with initial terms 0,1,1,3. A5824

Number of binary arrangements without adjacent 1's on n X n torus connected ne-sw nw-se. A67960

Number of polygons formed when every pair of vertices of a regular (2n-1)-gon are joined by an infinite line. A344866

The 240-degree spoke (or ray) of a hexagonal spiral of Ulam. A244805

Triangle T(n,k) read by rows: number of k X k triangular (0,1)-matrices with exactly n entries equal to 1 and no zero rows or columns. A137252

Expansion of ∏_k>=1 1/(1 - (5·k-2)*x^5·k-2). A265832

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 478", based on the 5-celled von Neumann neighborhood. A282484