Properties of the Number 81016

Eighty-One Thousand Sixteen

Basics

Value: 81015 → 81016 → 81017

Parity: even

Prime: No

Previous Prime: 81013

Next Prime: 81017

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ³ × 13 × 19 × 41

Divisors: 1, 2, 4, 8, 13, 19, 26, 38, 41, 52

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110001111000

Octal: 236170

Duodecimal: 3AA74

Hexadecimal: 13c78

Square: 6563592256

Square Root: 284.6330971619428

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) = n*(n + 11)*(n + 22)*(n + 33)*(n + 44)/120. A264450

a(n) = floor(n*(n-1)*(n-2)*(n-3)/30). A11940

Denominator of sum of reciprocals of first n 5-simplex numbers A000389. A118432

a(n) = (Lucas(4·n+3) + 1)/5, or Fibonacci(2·n+1)*Fibonacci(2·n+2), or A081015(n)/5. A81016

Numerator of sum of reciprocals of first n 5-simplex numbers A000389. A118431