Properties of the Number 31889

Thirty-One Thousand Eight Hundred Eighty-Nine

Basics

Value: 31888 → 31889 → 31890

Parity: odd

Prime: No

Previous Prime: 31883

Next Prime: 31891

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 11 × 13 × 223

Divisors: 1, 11, 13, 143, 223, 2453, 2899, 31889

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111110010010001

Octal: 76221

Duodecimal: 16555

Hexadecimal: 7c91

Square: 1016908321

Square Root: 178.57491425169437

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

Numbers generated by a Fibonacci-like sequence in which zeros are suppressed. A243063

Numerators of the partial alternating sums of the reciprocals of the sum of bi-unitary divisors function (A188999). A379617

Number of nX4 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. A303321

Triangle read by rows: T(n,k) = ∑_j=k..n binomial(n + j, n)*binomial(n, j)/(j + 1). A351385

Numbers k such that (5·10^k - 143)/3 is prime. A271821

a(n) gives the number of squares in the n-th iteration of the Harter-Heighway dragon. A339739

Lucky numbers with size of gaps equal to 6 (upper terms). A31889

Rolling icosahedron footprints: number of nX6 0..11 arrays starting with 0 where 0..11 label vertices of an icosahedron and every array movement to a horizontal, vertical or antidiagonal neighbor moves along an icosahedral edge. A223184