Properties of the Number 80218

Eighty Thousand Two Hundred Eighteen

Basics

Value: 80217 → 80218 → 80219

Parity: even

Prime: No

Previous Prime: 80209

Next Prime: 80221

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 19 × 2111

Divisors: 1, 2, 19, 38, 2111, 4222, 40109, 80218

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011100101011010

Octal: 234532

Duodecimal: 3A50A

Hexadecimal: 1395a

Square: 6434927524

Square Root: 283.22782349197263

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) = ∑_k=0..n binomial(n, k) * k! / floor(k/2)!. A18191

Number of rooted trees with n nodes such that four equals the maximal number of subtrees of the same size extending from the same node. A318819

Number of (n+2)X(3+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000101. A259767

Duplicate of A018191. A81126

Monotonically increasing sequence such that every positive integer n appears if and only if d(n) doesn't (d(n)=number of divisors of n, A000005). A80218