Properties of the Number 81862

Eighty-One Thousand Eight Hundred Sixty-Two

Basics

Value: 81861 → 81862 → 81863

Parity: even

Prime: No

Previous Prime: 81853

Next Prime: 81869

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 11 × 61 ²

Divisors: 1, 2, 11, 22, 61, 122, 671, 1342, 3721, 7442

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10011111111000110

Octal: 237706

Duodecimal: 3B45A

Hexadecimal: 13fc6

Square: 6701387044

Square Root: 286.1153613492292

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

a(n) is the number of pairs (x,y) where·is plane partition of n+1 and y is a plane partition of n and·covers y. A90984

Number of solutions to a+b+c = d+e+f with 0 < a <= n, 0 <= b,c,d,e,f <= n. A197083

(1/168)*(sigma₇(2n-1)-sigma₁(2n-1)). A81862