51632520 has 64 divisors (see below), whose sum is σ = 155373120. Its totient is φ = 13726464.

The previous prime is 51632509. The next prime is 51632527. The reversal of 51632520 is 2523615.

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

It is not an unprimeable number, because it can be changed into a prime (51632527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70074 + ... + 70806.

It is an arithmetic number, because the mean of its divisors is an integer number (2427705).

Almost surely, 2^51632520 is an apocalyptic number.

It is an amenable number.

51632520 is an abundant number, since it is smaller than the sum of its proper divisors (103740600).

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

51632520 is a wasteful number, since it uses less digits than its factorization.

51632520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 51632520 is about 7185.5772210728. The cubic root of 51632520 is about 372.3697906835.

The spelling of 51632520 in words is "fifty-one million, six hundred thirty-two thousand, five hundred twenty".