Properties of the Number 18227

Eighteen Thousand Two Hundred Twenty-Seven

Basics

Value: 18226 → 18227 → 18228

Parity: odd

Prime: No

Previous Prime: 18223

Next Prime: 18229

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 11 × 1657

Divisors: 1, 11, 1657, 18227

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100011100110011

Octal: 43463

Duodecimal: A66B

Hexadecimal: 4733

Square: 332223529

Square Root: 135.0074072041975

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 (n+2)X(k+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime. A251819

Numbers that are the sum of eight fourth powers in eight or more ways. A345583

Numbers that are the sum of eight fourth powers in nine or more ways. A345584

Numbers that are the sum of eight fourth powers in exactly nine ways. A345841

a(n) = n³ - 2·n² + 2. A100109

a(0) = 1, a(n) = 25·n² + 2 for n > 0. A10015

Number of triangles that can be built from rods with lengths 1,2,...,n by using and concatenating not necessarily all rods. A160456

Number of (n+2)X(3+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime. A251814

Number of (n+2)X(5+2) 0..2 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime. A251816

Semiprimes of the form k² + 2. A360739