Properties of the Number -21537

Twenty-One Thousand Five Hundred Thirty-Seven

Basics

Value: -21538 → -21537 → -21536

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 2393

Divisors: 1, 3, 9, 2393, 7179, 21537

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101010000100001

Octal: -52041

Duodecimal: -10569

Hexadecimal: -5421

Square: 463842369

Square Root: 146.7548977036201

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 partitions of n such that 2*(least part) <= greatest part. A237821

Number of singular 2 X 2 matrices having all elements in {-n,...,n}. A209981

Number of compositions of n+2 having exactly two parts equal to 1. A105423

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order. A205273

Number of regions among all distinct circles that can be constructed from n equally spaced points along a line using only a compass. A359253

T(n,k)=Number of nXk 0..1 arrays with every element equal to 2, 3, 4 or 7 king-move adjacent elements, with upper left element zero. A298133

Odd composites k such that σ(k) has the same powerful part as k, where σ is the sum of divisors function. A386425

Numbers with 3 or more prime factors (with multiplicity) such that every concatenation of their prime factors is prime. A217264

Terms k of A228058 such that gcd(k - A048250(k), A162296(k) - k) = A162296(k) - k. A325376

Number of unlabeled loopless multigraphs with n edges covering four vertices. A328652