Properties of the Number 20151

Twenty Thousand One Hundred Fifty-One

Basics

Value: 20150 → 20151 → 20152

Parity: odd

Prime: No

Previous Prime: 20149

Next Prime: 20161

Digit Sum: 9

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 2239

Divisors: 1, 3, 9, 2239, 6717, 20151

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100111010110111

Octal: 47267

Duodecimal: B7B3

Hexadecimal: 4eb7

Square: 406062801

Square Root: 141.95421797185176

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

Wiener index of a benzenoid consisting of a double-step zig-zag chain of n hexagons (n >= 2, s = 2123; see the Gutman et al. reference). A193395

Fibonacci sequence beginning 1, 12. A22102

a(n) = n³ + 4·n² - 5·n + 1. A241577

Antidiagonal sums of the convolution array A213762. A213764

Poincaré series [or Poincare series] of Lie algebra associated with a certain braid group. A7993

Isolated deficient numbers that are divisible by 3. A273255

Numbers k such that k and k+1 have the same positive sum of noninfinitary divisors (A348271). A348346

Pseudoprimes to base 23. A20151