Properties of the Number 30912

Thirty Thousand Nine Hundred Twelve

Basics

Value: 30911 → 30912 → 30913

Parity: even

Prime: No

Previous Prime: 30911

Next Prime: 30931

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 2 ⁶ × 3 × 7 × 23

Divisors: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100011000000

Octal: 74300

Duodecimal: 15A80

Hexadecimal: 78c0

Square: 955551744

Square Root: 175.8180878066873

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

Stirling2 triangle with scaled diagonals (powers of 2). A75497

Triangle of D'Arcais numbers. A8298

Composites k such that the concatenation of the prime factors of k, with multiplicity, in some order is divisible by k. A322843

a(n) = 6ⁿ/8 - 4^n-1 + 2^n-3. A16283

Numbers with prime factorization pqrs⁶. A190292

T(n,k)=Number of nXk arrays of permutations of 0..n·k-1 with rows nondecreasing modulo 2 and columns nondecreasing modulo 3. A264560

Place n equally spaced points on each side of an equilateral triangle, and join each of these points by a chord to the 2·n new points on the other two sides: sequence gives number of interior vertices in the resulting planar graph. A366484

A diagonal of triangle in A008298. A59356

Signed triangle of D'Arcais numbers (A008298) : coefficients of r in the polynomials generated by the series coefficients of zⁿ in Product[(1-z^k)^r, {k,1,Inf}]*(n!). A78521

a(n) = ∑_k=0..n-1 C(n-1,k)^k+1 * n/(n-k). A181075