Properties of the Number 81995

Eighty-One Thousand Nine Hundred Ninety-Five

Basics

Value: 81994 → 81995 → 81996

Parity: odd

Prime: No

Previous Prime: 81973

Next Prime: 82003

Digit Sum: 32

Digital Root: 5

Palindrome: No

Factorization: 5 × 23 ² × 31

Divisors: 1, 5, 23, 31, 115, 155, 529, 713, 2645, 3565

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100000001001011

Octal: 240113

Duodecimal: 3B54B

Hexadecimal: 1404b

Square: 6723180025

Square Root: 286.34769075374084

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 ways to remove n oranges from an infinite stack of oranges whose m-th layer is an m X (m+3) rectangle. A274597

Partial sums of floor(n³/3). A173707

a(n) = 7·n³ - 6·n². A382251

Diagonal of triangle A081994. A81995