Properties of the Number 21531

Twenty-One Thousand Five Hundred Thirty-One

Basics

Value: 21530 → 21531 → 21532

Parity: odd

Prime: No

Previous Prime: 21529

Next Prime: 21557

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 7177

Divisors: 1, 3, 7177, 21531

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010000011011

Octal: 52033

Duodecimal: 10563

Hexadecimal: 541b

Square: 463583961

Square Root: 146.73445403176447

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*(greatest part) < (number of parts). A237751

Numbers n such that Maple 9.5, Maple 10, Maple 11 and Maple 12 give the wrong answers for the number of partitions of n. A110375

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 537", based on the 5-celled von Neumann neighborhood. A282978

Least positive integer k such that both k and k·n belong to the set {m>0: 2·prime(prime(m))+1 = prime(p) for some prime p}. A261362

p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - S - S³. A292320

a(n) is the number of vertices formed by n-secting the angles of a decagon. A335801

Positive integers·such that x³ - 1 = y⁴ + z² for some positive integers y and z. A266215

Decimal expansion of 1/527. A21531