Properties of the Number 31387

Thirty-One Thousand Three Hundred Eighty-Seven

Basics

Value: 31386 → 31387 → 31388

Parity: odd

Prime: Yes

Previous Prime: 31379

Next Prime: 31391

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 31387

Divisors: 1, 31387

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101010011011

Octal: 75233

Duodecimal: 161B7

Hexadecimal: 7a9b

Square: 985143769

Square Root: 177.16376604712374

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

Primes or negative values of primes in the sequence b(n) = 47·n² - 1701·n + 10181, n >= 0. A50267

Primes that remain prime when a single digit 9 is inserted between any two consecutive digits or as the leading or trailing digit. A215421

Primes at which the difference pattern X424Y (X and Y >= 6) occurs in A001223. A52166

Number of ways to tile a 6 X n rectangle with 1 X 1 and 2 X 2 tiles. A63650

a(n) = largest Ramanujan prime R_k in A104272 that is <= A002386(n). A214756

Number of ways to tile a 7 X n rectangle with 1 X 1 and 2 X 2 tiles. A63651

Primes of the form floor(k^π). A74218

Primes p such that A001175(p) = 2*(p+1)/7. A308785

a(n) = floor( n^π ). A61294

Primes of the form 47·n² - 1701·n + 10181. A128878