Properties of the Number 15992

Fifteen Thousand Nine Hundred Ninety-Two

Basics

Value: 15991 → 15992 → 15993

Parity: even

Prime: No

Previous Prime: 15991

Next Prime: 16001

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 2 ³ × 1999

Divisors: 1, 2, 4, 8, 1999, 3998, 7996, 15992

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11111001111000

Octal: 37170

Duodecimal: 9308

Hexadecimal: 3e78

Square: 255744064

Square Root: 126.45947967629789

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

Partial sums of A299277. A299278

Number of rooted planar binary unlabeled trees with n leaves and caterpillar index = 4. A214202

a(0) = 1; a(n) = 4·n * a(n-1) + ∑_k=0..n-1 binomial(n,k) * (n-k-1)! * a(k). A343687

a(n) = ∑_{h=0..n, k=0..n} T(h,k), array T counting knights' moves as in A049604. A47881

Equals two maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 2 X n array. A220407

Eleven iterations of Reverse and Add are needed to reach a palindrome. A15992

Hypertribonacci number array read by antidiagonals. A136438