51900520 has 32 divisors (see below), whose sum is σ = 133459200. Its totient is φ = 17794368.

The previous prime is 51900467. The next prime is 51900521. The reversal of 51900520 is 2500915.

51900520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51900491 and 51900500.

It is not an unprimeable number, because it can be changed into a prime (51900521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92400 + ... + 92959.

It is an arithmetic number, because the mean of its divisors is an integer number (4170600).

Almost surely, 2^51900520 is an apocalyptic number.

It is an amenable number.

51900520 is an abundant number, since it is smaller than the sum of its proper divisors (81558680).

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

51900520 is a wasteful number, since it uses less digits than its factorization.

51900520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185377 (or 185373 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51900520 is about 7204.2015518724. The cubic root of 51900520 is about 373.0129443718.

The spelling of 51900520 in words is "fifty-one million, nine hundred thousand, five hundred twenty".