Properties of the Number 13231

Thirteen Thousand Two Hundred Thirty-One

Basics

Value: 13230 → 13231 → 13232

Parity: odd

Prime: No

Previous Prime: 13229

Next Prime: 13241

Digit Sum: 10

Digital Root: 1

Palindrome: Yes

Factorization: 101 × 131

Divisors: 1, 101, 131, 13231

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001110101111

Octal: 31657

Duodecimal: 77A7

Hexadecimal: 33af

Square: 175059361

Square Root: 115.02608399836969

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) = 15·n² - 9·n + 1. A134154

Sum of the third largest parts of the partitions of n into 9 parts. A326471

Palindromes with exactly 2 palindromic prime factors (counted with multiplicity), and no other prime factors. A46376

Centered 21-gonal numbers. A69178

a(n) = 30·n² + 1. A158558

Palindromes with exactly 2 distinct palindromic prime factors. A46408

Nonprime numbers with all divisors starting and ending with digit 1. A208261

a(n) = n! * ∑_{k=0..floor(n/3)} (-n/3)^k * binomial(n-2·k,k)/(n-2·k)!. A362304

Composite palindromes whose sum of prime factors is palindromic (counted with multiplicity). A46354

a(1) = 2; then smallest palindrome > 1 not occurring earlier such that every partial concatenation is a prime. A88086