Properties of the Number 55040

Fifty-Five Thousand Forty

Basics

Value: 55039 → 55040 → 55041

Parity: even

Prime: No

Previous Prime: 55021

Next Prime: 55049

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 ⁸ × 5 × 43

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101011100000000

Octal: 153400

Duodecimal: 27A28

Hexadecimal: d700

Square: 3029401600

Square Root: 234.60605277784288

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 permutations of {1,2,...,n} that result in a binary search tree of height k; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A195581

Number T(n,k) of permutations of {1,2,...,n} that result in a binary search tree of height k; triangle T(n,k), k>=0, k<=n<=2^k-1, read by columns. A244108

Number of permutations of {1,2,...,n} that result in a binary search tree with the minimum possible height. A76615

Triangular array: (1/2)*A193846. A193848

Coefficient of xⁿ in 1/(n+1) * (1 - 2·x - 2·x²)ⁿ⁺¹. A307969

Triangular array: (1/2)*A193847. A193849

Expansion of log(1+tan(x))/cos(x). A9372

Expansion of (1-x)/(1+2·x-2·x³). A78060

a(n) is the sum of all possible pairs of the first n primes. A162867

Quotient of de Bruijn sums S(4,n)/S(2,n). A99601