Properties of the Number 18161

Eighteen Thousand One Hundred Sixty-One

Basics

Value: 18160 → 18161 → 18162

Parity: odd

Prime: No

Previous Prime: 18149

Next Prime: 18169

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 11 × 13 × 127

Divisors: 1, 11, 13, 127, 143, 1397, 1651, 18161

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100011011110001

Octal: 43361

Duodecimal: A615

Hexadecimal: 46f1

Square: 329821921

Square Root: 134.76275449841472

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 (w,x,y,z) with all terms in {1,...,n} and w<2x and y<3z. A212508

Number of integer partitions of n whose parts have choosable sets of strict integer partitions. A387178

Irregular triangle T(n,m), numerators of coefficients in a power/Fourier series expansion of the plane pendulum's exact time dependence. A274130

Numbers that can be written in exactly two different ways as s₁^x_1 + ... + s_t^x_t, with 1 < s₁ < ... < s_t and {s₁,..., s_t} = {x₁,..., x_t} for some t > 0. A386966

Theorems from propositional calculus, translated into decimal digits. A101273

Smallest number such that the sum of the digits of n·a(n) is greater than n. A269333

Numbers n such that (n + prime(n)), (n+1 + prime(n+1)), (n+2 + prime(n+2)) and (n+3 + prime(n+3)) are divisible by 5. A107582

a(n) = floor(sqrt(2·n⁵)). A172473

Numbers k such that k⁶ == 1 (mod 7⁵). A56103

Number of active (ON, black) cells at stage 2ⁿ-1 of the two-dimensional cellular automaton defined by "Rule 646", based on the 5-celled von Neumann neighborhood. A273327