Properties of the Number 30918

Thirty Thousand Nine Hundred Eighteen

Basics

Value: 30917 → 30918 → 30919

Parity: even

Prime: No

Previous Prime: 30911

Next Prime: 30931

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5153

Divisors: 1, 2, 3, 6, 5153, 10306, 15459, 30918

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 111100011000110

Octal: 74306

Duodecimal: 15A86

Hexadecimal: 78c6

Square: 955922724

Square Root: 175.83515006960354

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 k such that 2^k - 5 is prime. A59608

T(n,k) = Number of n X k 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1. A285750

Numbers k such that 165·2^k-1 is prime. A50834

a(n) = ceiling(n³*(π/2)). A248198

Number of n X 3 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1. A285745

Number of 6 X n 0..1 arrays with the number of 1's horizontally, diagonally or antidiagonally adjacent to some 0 one less than the number of 0's adjacent to some 1. A285755

Numbers of ways in which a unit disc can be dissected into 6n curvilinear triangles, at least one of which does not contain the center. A193362

Triangle read by rows: T(n,m) = ∑_i=0..n+1 C(n-i+1,i-1)*C(n-i+1,i)*C(n-i+1,m-i+1). A298309

[ exp(9/14)*n! ]. A30918