52511640 has 64 divisors (see below), whose sum is σ = 166808160. Its totient is φ = 13178880.

The previous prime is 52511597. The next prime is 52511651. The reversal of 52511640 is 4611525.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 52511640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10831 + ... + 14910.

Almost surely, 2^52511640 is an apocalyptic number.

It is an amenable number.

52511640 is an abundant number, since it is smaller than the sum of its proper divisors (114296520).

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

52511640 is a wasteful number, since it uses less digits than its factorization.

52511640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25772 (or 25768 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 52511640 is about 7246.4915648885. The cubic root of 52511640 is about 374.4712904825.

The spelling of 52511640 in words is "fifty-two million, five hundred eleven thousand, six hundred forty".