Properties of the Number 25831

Twenty-Five Thousand Eight Hundred Thirty-One

Basics

Value: 25830 → 25831 → 25832

Parity: odd

Prime: No

Previous Prime: 25819

Next Prime: 25841

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 13 × 1987

Divisors: 1, 13, 1987, 25831

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110010011100111

Octal: 62347

Duodecimal: 12B47

Hexadecimal: 64e7

Square: 667240561

Square Root: 160.72025385744013

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 5^k - 4 is prime. A59613

E.g.f.: -log( ∑_n>=0 (-x)^n² / (n²)! ). A205804

Square array A(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where A(n,k) = n! * k! * [xⁿ * y^k] (1/2) * (1 / (exp(x) + exp(y) - exp(x+y))² - 1). A382740

Composites in base 10 that remain composite in exactly four bases b, 2 <= b <= 10, expansions interpreted as decimal numbers. A256354

Centered 30-gonal numbers. A389799

Number of partitions satisfying cn(1,5) + cn(4,5) < cn(2,5) + cn(3,5). A39892

Expansion of (1+x⁴*C³)*C⁴, where C = (1-(1-4·x)^1/2)/(2·x) is g.f. for Catalan numbers, A000108. A71753

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (0, 0, -1), (0, 0, 1), (1, 0, -1)}. A148578

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, -1), (0, 0, 1), (1, -1, -1), (1, 1, 1)}. A150357

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal minus antidiagonal sum nondecreasing horizontally and vertically. A253456