Properties of the Number 23218

Twenty-Three Thousand Two Hundred Eighteen

Basics

Value: 23217 → 23218 → 23219

Parity: even

Prime: No

Previous Prime: 23209

Next Prime: 23227

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 13 × 19 × 47

Divisors: 1, 2, 13, 19, 26, 38, 47, 94, 247, 494

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101101010110010

Octal: 55262

Duodecimal: 1152A

Hexadecimal: 5ab2

Square: 539075524

Square Root: 152.3745385554949

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

a(n) = -n³ + 7·n² - 5·n + 1. A161708

T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero. A284222

Number of unlabeled simple graphs covering n vertices such that it is possible to choose a different vertex from each edge (choosable). A368834

Squarefree numbers k such that k² is abundant, and d² is nonabundant for any proper divisor d of k. A381741

Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k UUU's (triplerises) (n >= 0; 0 <= k <= n-2 for n >= 2). A128719

Products of four distinct primes between sphenic numbers (products of 3 distinct primes). A351382

Radicands of pure cubic number fields of type β and subtype M0. A363699

Coordination sequence for MgCu2, Mg position. A9931

Numbers n for which A222085(n)=A222085(n+1). A222088

Numbers n such that the decimal digits of n-φ(n) are a permutation of those of n. A273799