51043320 has 96 divisors (see below), whose sum is σ = 168311520. Its totient is φ = 13413120.

The previous prime is 51043273. The next prime is 51043327. The reversal of 51043320 is 2334015.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51043293 and 51043302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51043327) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24562 + ... + 26558.

It is an arithmetic number, because the mean of its divisors is an integer number (1753245).

Almost surely, 2^51043320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51043320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84155760).

51043320 is an abundant number, since it is smaller than the sum of its proper divisors (117268200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51043320 is a wasteful number, since it uses less digits than its factorization.

51043320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085 (or 2078 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51043320 is about 7144.4607914104. The cubic root of 51043320 is about 370.9479466739.

Adding to 51043320 its reverse (2334015), we get a palindrome (53377335).

The spelling of 51043320 in words is "fifty-one million, forty-three thousand, three hundred twenty".