Properties of the Number 13218

Thirteen Thousand Two Hundred Eighteen

Basics

Value: 13217 → 13218 → 13219

Parity: even

Prime: No

Previous Prime: 13217

Next Prime: 13219

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 2203

Divisors: 1, 2, 3, 6, 2203, 4406, 6609, 13218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001110100010

Octal: 31642

Duodecimal: 7796

Hexadecimal: 33a2

Square: 174715524

Square Root: 114.9695611890382

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

Numbers on the square spiral board that are enclosed by four primes. A341542

a(n) = 420·2ⁿ - 222. A304614

Number of partitions into non-integral powers. A327

Triangle of coefficients of polynomials u(n,x) jointly generated with A209140; see the Formula section. A209139

Total number of modes in all partitions of n. A372542

Numbers that are divisible by exactly 3 primes (counted with multiplicity) and sandwiched between primes. A171179

Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral. A172294

Numbers whose second arithmetic derivative (A068346) is a primorial number (A002110) > 1. A368702

Square root of A030681. A30682

Values of m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,21. A64247