Properties of the Number 30821

Thirty Thousand Eight Hundred Twenty-One

Basics

Value: 30820 → 30821 → 30822

Parity: odd

Prime: No

Previous Prime: 30817

Next Prime: 30829

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 7 ² × 17 × 37

Divisors: 1, 7, 17, 37, 49, 119, 259, 629, 833, 1813

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 111100001100101

Octal: 74145

Duodecimal: 15A05

Hexadecimal: 7865

Square: 949934041

Square Root: 175.55910685578235

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 positions of the 15-puzzle at a distance of n moves from an initial state with the empty square in one of the corners, in the single-tile metric. A89484

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n) + n, where a(0) = 1, a(1) = 2, b(0) = 3, b(1) = 4, b(2) = 5, and (a(n)) and (b(n)) are increasing complementary sequences. A296555

Number of 1324-avoiding permutations of length n with a non-intersecting boundary of type (t, 2), for some integer t >= 1. A278026

Smallest of 6 consecutive integers divisible respectively by 6 consecutive primes. A72722

[ exp(8/23)*n! ]. A30821