Properties of the Number 18255

Eighteen Thousand Two Hundred Fifty-Five

Basics

Value: 18254 → 18255 → 18256

Parity: odd

Prime: No

Previous Prime: 18253

Next Prime: 18257

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 1217

Divisors: 1, 3, 5, 15, 1217, 3651, 6085, 18255

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100011101001111

Octal: 43517

Duodecimal: A693

Hexadecimal: 474f

Square: 333245025

Square Root: 135.11106542396888

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

G.f.: 1 + ∑_n>=1 a(n)*xⁿ/(1 - xⁿ) = ∏_n>=1 (1 + n·xⁿ). A300278

a(n) = 81·n² + 2·n. A177099

a(n) = A273059(4n+1). A275917

a(n) = ∑_{k=0..floor(n/4)} 2^k * binomial(n-3·k,k)². A387508

Numbers k that divide the (left) concatenation of all numbers <= k written in base 19 (most significant digit on left). A29488

Number of nonempty subsets of {1, 2, ..., n} with <=5 pairwise coprime elements. A187266

Number of 4 X n binary arrays without the pattern 0 1 diagonally, vertically, antidiagonally or horizontally. A188555

Least term in period of continued fraction for sqrt(n) is 9. A31433

Numbers k such that 5·2^k + 7 is prime. A59748

Numbers k such that the smoothly undulating palindromic number (31·10^k - 13)/99 is a prime. A62216