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Properties of the Number 18231

Eighteen Thousand Two Hundred Thirty-One

Basics

Value: 18230 → 18231 → 18232

Parity: odd

Prime: No

Previous Prime: 18229

Next Prime: 18233

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 59 × 103

Divisors: 1, 3, 59, 103, 177, 309, 6077, 18231

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011100110111

Octal: 43467

Duodecimal: A673

Hexadecimal: 4737

Square: 332369361

Square Root: 135.02222039353376

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

Integers k such that 0 < |k5 - m2| <= k3/2 for some integer m. A116884
Numbers k such that the decimal digits of φ(k) are a permutation of those of k. A115921
Column 0 of the matrix log of triangle A118180, after term in row n is multiplied by n: a(n) = n*[log(A118180)](n,0), where A118180(n,k) = 3k*(n-k). A118184
Values·for record minima of the positive distance d between the square of an integer y and the fifth power of a positive integer·such that d = y2 - x5 (x <> k2 and y <> k5). A198444
Numerators of continued fraction convergents to sqrt(166). A41306
Number of n-digit biquanimous strings using digits {0,1,...,8}. A288692
Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 45. A31723
Numbers k with property that 19·k + {2,4,8,10} are two pairs of consecutive twin primes. A152926
Number of (n+1) X (4+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock. A235880
Number of (n+1) X (7+1) 0..2 arrays with the minimum plus the upper median equal to the lower median plus the maximum in every 2 X 2 subblock. A235883