Properties of the Number 31913

Thirty-One Thousand Nine Hundred Thirteen

Basics

Value: 31912 → 31913 → 31914

Parity: odd

Prime: No

Previous Prime: 31907

Next Prime: 31957

Digit Sum: 17

Digital Root: 8

Palindrome: Yes

Factorization: 7 × 47 × 97

Divisors: 1, 7, 47, 97, 329, 679, 4559, 31913

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111110010101001

Octal: 76251

Duodecimal: 16575

Hexadecimal: 7ca9

Square: 1018439569

Square Root: 178.6421003011328

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

MM-numbers of labeled graphs with loops spanning an initial interval of positive integers. A320461

Number of partitions of n into 10 or more distinct parts. A347577

Left diagonal of partition triangle A047812. A7044

Base-10 palindromes that starts with 3. A43038

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 169", based on the 5-celled von Neumann neighborhood. A286173

Palindromic composite numbers starting with a digit 3. A222726

Conjectured record-breaking numbers of odd elements, for ascending positive integers k, in primitive cycles of positive integers under iteration by the Collatz-like 3x+k function. A226673

Palindromes that are the sum of two positive cubes. A162710

Lexicographically earliest sequence of distinct positive integers such that the concatenation of any four successive digits forms a prime. A334050

a(n) is the odd-length palindrome whose digits up to the center are those of n and whose center digit is equal to the digital root of the product of the factorial of n and the reverse of n. A82941