51885520 has 40 divisors (see below), whose sum is σ = 123447456. Its totient is φ = 20270208.

The previous prime is 51885511. The next prime is 51885577. The reversal of 51885520 is 2558815.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4102 + ... + 10981.

Almost surely, 2^51885520 is an apocalyptic number.

It is an amenable number.

51885520 is an abundant number, since it is smaller than the sum of its proper divisors (71561936).

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

51885520 is a wasteful number, since it uses less digits than its factorization.

51885520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15139 (or 15133 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 51885520 is about 7203.1604174834. The cubic root of 51885520 is about 372.9770055329.

The spelling of 51885520 in words is "fifty-one million, eight hundred eighty-five thousand, five hundred twenty".