Properties of the Number 18157

Eighteen Thousand One Hundred Fifty-Seven

Basics

Value: 18156 → 18157 → 18158

Parity: odd

Prime: No

Previous Prime: 18149

Next Prime: 18169

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 67 × 271

Divisors: 1, 67, 271, 18157

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011011101101

Octal: 43355

Duodecimal: A611

Hexadecimal: 46ed

Square: 329676649

Square Root: 134.74791278531924

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

T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with every element equal to or 1 greater than any northeast or northwest neighbors modulo n and the upper left element equal to 0. A267019

Numbers m such that 5^m reversed is a prime. A58993

T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor. A199256

Numbers n such that n¹⁰²⁴ + (n+1)¹⁰²⁴ is prime. A274234

Number of ways the first n cubes can be partitioned into three sets with equal sums. A327448

Numbers k such that A276086(k) is a multiple of A003415(k) and A276087(k) is a multiple of A327859(k). A393071

Numerators of continued fraction convergents to sqrt(866). A42672

Numbers k such that (7·10^2k+1 - 18·10^k - 7)/9 is prime. A183180

Number of partitions p of n containing floor((min(p) + max(p))/2) as a part. A238482

Squarefree k > 1 with σ(σ(σ(k))) < 3·k + 1. A320513