Properties of the Number 28131

Twenty-Eight Thousand One Hundred Thirty-One

Basics

Value: 28130 → 28131 → 28132

Parity: odd

Prime: No

Previous Prime: 28123

Next Prime: 28151

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 9377

Divisors: 1, 3, 9377, 28131

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110110111100011

Octal: 66743

Duodecimal: 14343

Hexadecimal: 6de3

Square: 791353161

Square Root: 167.7229859023503

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 in A056106. A113524

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 305", based on the 5-celled von Neumann neighborhood. A287545

The number of lit cells in weakly decreasing partitions of n when light shines from the north west. Here partitions are represented from left to right by columns of cells. A366157

Number of upper Wythoff primes (A095281) in range ]2ⁿ,2ⁿ⁺¹]. A95291

Number of (n+4) X 11 0..1 matrices with each 5 X 5 subblock idempotent. A224689

G.f.: ∑_n>=0 ( ∏_k=1..n 1 + x*(1+x)^k ) / 2ⁿ⁺¹. A338793

Expansion of 1/((1-4x)(1-6x)(1-7x)(1-9x)). A28131