Properties of the Number 31480

Thirty-One Thousand Four Hundred Eighty

Basics

Value: 31479 → 31480 → 31481

Parity: even

Prime: No

Previous Prime: 31477

Next Prime: 31481

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 5 × 787

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 787, 1574

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101011111000

Octal: 75370

Duodecimal: 16274

Hexadecimal: 7af8

Square: 990990400

Square Root: 177.426040929735

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 rooted trees where any 2 subtrees extending from the same node have a different number of nodes. A32305

Irregular table: n-th row polynomial given by the formal power series expansion of ∑_{k >= 0} (1 + q)^{n·k + k*(k+1}/2)* ∏_{j = 1..k} (1 - (1 + q)^j), n >= 1. A340880

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 331", based on the 5-celled von Neumann neighborhood. A271279

G.f. satisfies: A(x) = 1 + x·A(x)⁴*A(x·A(x)⁴). A215506

Number of nX4 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 1 or 3 neighboring 1s. A296392

Numbers whose base-6 representation has one fewer 0 than 5's. A31480