Properties of the Number 13213

Thirteen Thousand Two Hundred Thirteen

Basics

Value: 13212 → 13213 → 13214

Parity: odd

Prime: No

Previous Prime: 13187

Next Prime: 13217

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 73 × 181

Divisors: 1, 73, 181, 13213

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: 11001110011101

Octal: 31635

Duodecimal: 7791

Hexadecimal: 339d

Square: 174583369

Square Root: 114.94781424629178

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

Triangle read by rows: number of nonisomorphic semigroups of order n with k idempotents. A58108

Nonprime Heinz numbers of multiples of triangular partitions, or of finite arithmetic progressions with offset 0. A325407

a(n) = (2·n + 1)*(5·n + 1). A33571

Numbers k such that binomial(3k, k) + 1 is prime. A125221

a(n) = prime(n) * prime(2n). A319613

Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 1,3,2. A37617

Nonprimes k such that k divides 3^k-1 - 2^k-1. A73631

Odd heptagonal numbers (A000566). A14637

Number of orbits of the 4-step recursion mod n. A106286

Number of isomorphism classes of idempotent semigroups of order n. A58112