Properties of the Number 31045

Thirty-One Thousand Forty-Five

Basics

Value: 31044 → 31045 → 31046

Parity: odd

Prime: No

Previous Prime: 31039

Next Prime: 31051

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 5 × 7 × 887

Divisors: 1, 5, 7, 35, 887, 4435, 6209, 31045

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100101000101

Octal: 74505

Duodecimal: 15B71

Hexadecimal: 7945

Square: 963792025

Square Root: 176.1959136870092

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

The Wiener index of a chain of n triangles (i.e., joined like VVV..VV; here V is a triangle!). A143941

a(n) = (9·n⁴+10·n³-3·n²-4·n)/12. A172045

Number of nX3 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300600

Number of nX3 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A301325

Number of nX3 0..1 arrays with every element unequal to 0, 1, 3, 4 or 7 king-move adjacent elements, with upper left element zero. A304850

Coefficient array for the third power of the monic integer Chebyshev polynomials 2·T(2·n,x/2) as a function of x². A219236

Triangle T(n,k): write n in base 8, reverse order of digits. A31045

Number of columns ending at an odd level in all deco polyominoes of height n. A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column. A121752

Coordination sequence for B₁₅ lattice. A107548