Properties of the Number 31187

Thirty-One Thousand One Hundred Eighty-Seven

Basics

Value: 31186 → 31187 → 31188

Parity: odd

Prime: No

Previous Prime: 31183

Next Prime: 31189

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 13 × 2399

Divisors: 1, 13, 2399, 31187

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100111010011

Octal: 74723

Duodecimal: 1606B

Hexadecimal: 79d3

Square: 972628969

Square Root: 176.5984144889189

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

Number of trimagic series for squares of order n. A52458

Number of (2n+1) X (2n+1) black-and-white grids that are legal for crossword puzzles and have no all-black edges. A323839

a(n) is the smallest m for which A188550(m)=n, or a(n)=0 if no such m exists. A188586

Number of linear chord diagrams having n chords and no chord length larger than six. A293998

Number of (n+1)X6 0..3 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively. A203738

Number of (n+1) X (5+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction. A250704

Numbers having period-1 5-digitized sequences. A31187