Properties of the Number 21483

Twenty-One Thousand Four Hundred Eighty-Three

Basics

Value: 21482 → 21483 → 21484

Parity: odd

Prime: No

Previous Prime: 21481

Next Prime: 21487

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 11 × 31

Divisors: 1, 3, 7, 9, 11, 21, 31, 33, 63, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001111101011

Octal: 51753

Duodecimal: 10523

Hexadecimal: 53eb

Square: 461519289

Square Root: 146.5708020036733

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

Consider the base-8 Kaprekar map n->K(n) defined in A165090. Sequence gives numbers belonging to cycles, including fixed points. A165095

Consider the base-8 Kaprekar map n->K(n) defined in A165090. Sequence gives numbers belonging to cycles of length greater than 1. A165097

Smallest member of cycle corresponding to n-th term of A165107. A165108

Consider the base-8 Kaprekar map n->K(n) defined in A165090. Sequence gives least elements of each cycle, including fixed points. A165099

Consider the base-8 Kaprekar map n->K(n) defined in A165090. Sequence gives least elements of each cycle of length > 1. A165101

a(n) = (2·n + 1)*(5·n + 1). A33571

Consider the base-8 Kaprekar map x->K(x) described in A165090. Sequence gives the smallest number that belongs to a cycle of length n under repeated iteration of this map, or -1 if there is no cycle of length n. A165106

Numbers n such that there are precisely 11 groups of orders n and n + 1. A295994

a(1) = 2; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1. A25003

Expansion of ((∏_n>=1 (1 - x^3·n)/(1 - xⁿ)³) - 1)/3 in powers of x. A277968