Properties of the Number 80805

Eighty Thousand Eight Hundred Five

Basics

Value: 80804 → 80805 → 80806

Parity: odd

Prime: No

Previous Prime: 80803

Next Prime: 80809

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 5387

Divisors: 1, 3, 5, 15, 5387, 16161, 26935, 80805

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011101110100101

Octal: 235645

Duodecimal: 3A919

Hexadecimal: 13ba5

Square: 6529448025

Square Root: 284.26220290429046

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

Let A denote the sequence; A is equal to the union of the self-convolutions A² and A³, with terms in ascending order by size. A90845

Self-convolution square of A090845. A222082

G.f. A(x) satisfies: a([n/r²]) = [xⁿ] A(x)²/x and a([n/r³]) = [xⁿ] A(x)³/x², for n>=1, where r² + r³ = 1. A262990

Numbers n such that A072475(n) divides A071221(n). A80805

Each term is previous term plus ceiling of root mean square of two previous terms. A114833