Properties of the Number 21316

Twenty-One Thousand Three Hundred Sixteen

Basics

Value: 21315 → 21316 → 21317

Parity: even

Prime: No

Previous Prime: 21313

Next Prime: 21317

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 73 ²

Divisors: 1, 2, 4, 73, 146, 292, 5329, 10658, 21316

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001101000100

Octal: 51504

Duodecimal: 10404

Hexadecimal: 5344

Square: 454371856

Square Root: 146

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

a(n) = (5·n + 1)². A16862

Number of integer compositions of n whose leaders of strictly decreasing runs are strictly increasing. A374762

a(n) = (6·n + 2)². A16934

Squares with initial digit '2'. A45785

Natural number that is a factor of its number of "feasible" partition(s). A254437

Squares whose product of digits is also a nonzero square. A53059

T(n,k)=Number of nXk 0..3 arrays with every element neighboring horizontally or vertically both a 0 and a 1. A204084

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 exactly five ways. A345817

a(n) is the smallest square that is the sum of n distinct positive squares. A18936