51032920 has 16 divisors (see below), whose sum is σ = 114824160. Its totient is φ = 20413152.

The previous prime is 51032909. The next prime is 51032939. The reversal of 51032920 is 2923015.

It is a junction number, because it is equal to n+sod(n) for n = 51032891 and 51032900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637872 + ... + 637951.

It is an arithmetic number, because the mean of its divisors is an integer number (7176510).

Almost surely, 2^51032920 is an apocalyptic number.

It is an amenable number.

51032920 is an abundant number, since it is smaller than the sum of its proper divisors (63791240).

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

51032920 is a wasteful number, since it uses less digits than its factorization.

51032920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275834 (or 1275830 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 51032920 is about 7143.7329177399. The cubic root of 51032920 is about 370.9227515998.

Adding to 51032920 its reverse (2923015), we get a palindrome (53955935).

The spelling of 51032920 in words is "fifty-one million, thirty-two thousand, nine hundred twenty".