Properties of the Number -21251

Twenty-One Thousand Two Hundred Fifty-One

Basics

Value: -21252 → -21251 → -21250

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 79 × 269

Divisors: 1, 79, 269, 21251

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -101001100000011

Octal: -51403

Duodecimal: -1036B

Hexadecimal: -5303

Square: 451605001

Square Root: 145.7772273024837

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 m having the same sum of divisors as m+20 has. A181647

Numbers that are the sum of six fourth powers in five or more ways. A345562

Numbers that are the sum of six fourth powers in six or more ways. A345563

Numbers that are the sum of six fourth powers in seven or more ways. A345564

Numbers that are the sum of six fourth powers in exactly seven ways. A345819

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 2, 3, 5, 6 or 7 king-move adjacent elements, with upper left element zero. A299249

MM-numbers of crossing set partitions. A324324

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 459", based on the 5-celled von Neumann neighborhood. A288403

a(n) = ∑_k=1..n C(n,k)⁴ where C(n,k) is binomial(n,k). A96192

a(n) = 34·n² + 1. A158586