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Properties of the Number 30913

Thirty Thousand Nine Hundred Thirteen

Basics

Value: 30912 → 30913 → 30914

Parity: odd

Prime: No

Previous Prime: 30911

Next Prime: 30931

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 19 × 1627

Divisors: 1, 19, 1627, 30913

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 111100011000001

Octal: 74301

Duodecimal: 15A81

Hexadecimal: 78c1

Square: 955613569

Square Root: 175.82093163215805

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

Centered octahedral numbers (crystal ball sequence for cubic lattice). A1845
Number of intersections of diagonals in the interior of a regular n-gon. A6561
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237472
Number of integer partitions of n whose rounded mean is > 1. Partitions with mean >= 3/2. A364059
Number of (n+1) X (1+1) 0..2 arrays with the maximum plus the lower median minus the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one. A237465
Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237469
Number of nX4 0..1 arrays with every element unequal to 0, 1, 2 or 7 king-move adjacent elements, with upper left element zero. A304226
a(n) = (9·n3 + 5·n)/2. A230018
Number of parallelogram polyominoes with n cells (also called staircase polyominoes, although that term is overused). A6958
[ exp(4/15)*n! ]. A30913