Properties of the Number 99216

Ninety-Nine Thousand Two Hundred Sixteen

Basics

Value: 99215 → 99216 → 99217

Parity: even

Prime: No

Previous Prime: 99191

Next Prime: 99223

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 ⁴ × 3 ² × 13 × 53

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 13, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11000001110010000

Octal: 301620

Duodecimal: 49500

Hexadecimal: 18390

Square: 9843814656

Square Root: 314.9857139617605

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 permutations p of [n] such that the up-down signature of p has nonnegative partial sums with a maximal value <= 6. A262131

a(n) = 81·n² - 9. A157909

a(n) = n!*∑_k=0..n/2 n^2k/(2k)!. A46707

Molecular topological index of the Andrásfai graphs. A192790

Numerator of the x-coordinate of the 3rd point (x,y) of the n-th triangle with integer sides in the list given by A316841, when the triangle is drawn with the longest side from (0,0) to (0,A316843(n)) and the middle side A316844(n) from (0,A316843(n)) to (x,y). x = a(n)/A331696(n), y = sqrt(A331697(n))/A331696(n). A331695

a(n)=4a(n-1)-4a(n-2)+2a(n-3). A99216