Properties of the Number 31279

Thirty-One Thousand Two Hundred Seventy-Nine

Basics

Value: 31278 → 31279 → 31280

Parity: odd

Prime: No

Previous Prime: 31277

Next Prime: 31307

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 31 × 1009

Divisors: 1, 31, 1009, 31279

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101000101111

Octal: 75057

Duodecimal: 16127

Hexadecimal: 7a2f

Square: 978375841

Square Root: 176.85870066242146

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

Smallest palindromic number of 5 digits in two bases differing by n. A216899

a(n) is the concatenation of n and 9n. A9474

Semiprimes generated by the polynomial 2·n² + 29. A241554

Composite numbers of the form 2·k² + 29. A352949

Numbers whose set of base-13 digits is {1,3}. A32920

The arithmetic mean of the n-th and (n+1)-st cubes, rounded down. A147656

Least positive integer not representable using exactly n 9's and the operations +-*/(). A66409

G.f. A(x) satisfies A(x) = 1 + x/(1-9·x³)^1/3 * A( x/sqrt(1-9·x³)^1/3 ). A251176

Length of n-th run of digit 3 in A031269. A31279