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Properties of the Number 21330

Twenty-One Thousand Three Hundred Thirty

Basics

Value: 21329 → 21330 → 21331

Parity: even

Prime: No

Previous Prime: 21323

Next Prime: 21341

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 3 × 5 × 79

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001101010010

Octal: 51522

Duodecimal: 10416

Hexadecimal: 5352

Square: 454968900

Square Root: 146.04793733565702

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 that are the sum of five fourth powers in three or more ways. A344243
Numbers that are the sum of five fourth powers in exactly three ways. A344244
Expansion of ∏k>=1 (1 + 5·xk). A261569
Number of partitions p of n such that (number of even numbers in p) > (number of odd numbers in p). A241640
Number of parts of the n-th subshell of the head of the last section of the set of partitions of any even integer >= 2n. A182992
Triangle of coefficients of polynomials v(n,x) jointly generated with A209996; see the Formula section. A209998
The Wiener index of the Dutch windmill graph D(5,n) (n>=1). A180579
Number of chiral pairs of colorings of the edges of a regular tetrahedron using n or fewer colors. A337899
a(n) = (2·n3 + 5·n2 - 13·n)/2. A162262
Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4, 5 or 7 king-move adjacent elements, with upper left element zero. A305913