Properties of the Number 5181

Five Thousand One Hundred Eighty-One

Basics

Value: 5180 → 5181 → 5182

Parity: odd

Prime: No

Previous Prime: 5179

Next Prime: 5189

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 11 × 157

Divisors: 1, 3, 11, 33, 157, 471, 1727, 5181

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010000111101

Octal: 12075

Duodecimal: 2BB9

Hexadecimal: 143d

Square: 26842761

Square Root: 71.97916365171243

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 2's in all partitions of n. A24786

Number of integer partitions of n with as many even parts as even conjugate parts. A350948

Numbers n such that the decimal expansions of both n and n² have 1 as smallest digit and 8 as largest digit. A257211

G.f.: 1/((1-x)*(1-x²)*(1-x³)²*(1-x⁴)*(1-x⁵)). A3402

Number of partitions of n into partition numbers. A7279

Number of achiral free pure multifunctions with n unlabeled leaves. A317875

Third row of number array A082105. A82109

Numbers k such that 5·k! - 1 is prime. A99351

Numbers k such that τ(k) = τ(k+1) mod 691, where τ is Ramanujan's τ function A000594. A121733

Position of first appearance of n in the run-lengths (differing by 0) of the run-lengths (differing by 2) of the odd primes. A373825