Properties of the Number 30849

Thirty Thousand Eight Hundred Forty-Nine

Basics

Value: 30848 → 30849 → 30850

Parity: odd

Prime: No

Previous Prime: 30841

Next Prime: 30851

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 13 × 113

Divisors: 1, 3, 7, 13, 21, 39, 91, 113, 273, 339

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100010000001

Octal: 74201

Duodecimal: 15A29

Hexadecimal: 7881

Square: 951660801

Square Root: 175.6388339747221

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

Nonnegative values·of solutions (x, y) to the Diophantine equation x² + (x + 31)² = y². A118674

Expansion of (1-2·x²-sqrt(1-4·x²-4·x³))/(2·x*sqrt(1-4·x²-4·x³)). A234269

Expansion of (1-x)/(1+x+2·x²+x³). A78051

a(0)=0, a(1)=1, a(2)=2 and a(n) = a(n-1) - 2a(n-2) + a(n-3). A166117

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 291", based on the 5-celled von Neumann neighborhood. A271131

Composite squarefree integers for which the sum of the squares of their factors is a square. A379780

a(n) = ∑_i=0..n T(i,n-i), array T as in A049735. A49736

Floor( exp(4/21)*n! ). A30849