Properties of the Number -217217

Two Hundred Seventeen Thousand Two Hundred Seventeen

Basics

Value: -217218 → -217217 → -217216

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7 ² × 11 × 13 × 31

Divisors: 1, 7, 11, 13, 31, 49, 77, 91, 143, 217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110101000010000001

Octal: -650201

Duodecimal: -A5855

Hexadecimal: -35081

Square: 47183225089

Square Root: 466.06544604808454

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 T(n,k) of endofunctions on [n] with exactly k fixed points, none of which are isolated; triangle T(n,k), n >= 0, 0 <= k <= n/2, read by rows. A350454

a(n) = n*(n+1)*(n+2)*(n+3)*(20·n²+72·n+43)/360. A214616

Numbers n such that n, n+1, and the sum of those two numbers each have 4 or more distinct prime factors. A168630