Properties of the Number 82381

Eighty-Two Thousand Three Hundred Eighty-One

Basics

Value: 82380 → 82381 → 82382

Parity: odd

Prime: No

Previous Prime: 82373

Next Prime: 82387

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 13 × 6337

Divisors: 1, 13, 6337, 82381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10100000111001101

Octal: 240715

Duodecimal: 3B811

Hexadecimal: 141cd

Square: 6786629161

Square Root: 287.020905161976

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

T(n,k)=Number of arrays of n integers in -k..k with sum zero and equal numbers of elements greater than zero and less than zero. A201811

Number of arrays of n integers in -2..2 with sum zero and equal numbers of elements greater than zero and less than zero. A201805

a(n) = ∑_k=0..n binomial(n,k) * binomial(n·k,k). A383120

Sequence of the squared digital root of a number until 1 or 4 is reached. The initial numbers 1,2,..n are not output. A82381