Properties of the Number 21371

Twenty-One Thousand Three Hundred Seventy-One

Basics

Value: 21370 → 21371 → 21372

Parity: odd

Prime: No

Previous Prime: 21347

Next Prime: 21377

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 7 × 43 × 71

Divisors: 1, 7, 43, 71, 301, 497, 3053, 21371

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001101111011

Octal: 51573

Duodecimal: 1044B

Hexadecimal: 537b

Square: 456719641

Square Root: 146.18823482072693

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 satisfying 0 < cn(0,5) + cn(2,5) + cn(3,5). A39899

a(n) = ∑_k=1..n binomial(floor(n/k)+4,5). A365439

Numbers k such that the concatenation 1,2,3,...,(k-1) is divisible by k. A110740

Fibonacci sequence beginning 14, 13. A206564

Expansion of 1/sqrt((1+x)³ * (1-7·x)). A383947

Number of n-step spiral self-avoiding walks on hexagonal lattice, where at each step one may continue in same direction or make turn of 2*π/3 counterclockwise. A511

Decimal expansion of 1/367. A21371