Properties of the Number 51181

Fifty-One Thousand One Hundred Eighty-One

Basics

Value: 51180 → 51181 → 51182

Parity: odd

Prime: No

Previous Prime: 51169

Next Prime: 51193

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 13 × 31 × 127

Divisors: 1, 13, 31, 127, 403, 1651, 3937, 51181

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100011111101101

Octal: 143755

Duodecimal: 25751

Hexadecimal: c7ed

Square: 2619494761

Square Root: 226.23218161879623

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

Smallest composite·such that σ(x+2ⁿ) = σ(x) + 2ⁿ. A54987

Number of (w,x,y,z) with all terms in {1,...,n} and w²>=x·y*z. A212064

The Wiener index of the graph obtained by applying Mycielski's construction to a benzenoid consisting of a linear chain of n hexagons. A228597

Sum of divisors of the minimal numbers (A007416). A256259

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A318070

Numbers having four 7's in base 9. A43484

Number of 4-element intersecting families of an n-element set. A51181

Number of n X 4 0..1 arrays with every element unequal to 0, 1, 2, 3, 5 or 7 king-move adjacent elements, with upper left element zero. A305772