51332520 has 64 divisors (see below), whose sum is σ = 163062720. Its totient is φ = 12882944.

The previous prime is 51332513. The next prime is 51332551. The reversal of 51332520 is 2523315.

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, 10542 + ... + 14621.

It is an arithmetic number, because the mean of its divisors is an integer number (2547855).

Almost surely, 2^51332520 is an apocalyptic number.

It is an amenable number.

51332520 is an abundant number, since it is smaller than the sum of its proper divisors (111730200).

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

51332520 is a wasteful number, since it uses less digits than its factorization.

51332520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25194 (or 25190 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 51332520 is about 7164.6716603066. The cubic root of 51332520 is about 371.6471970157.

Adding to 51332520 its reverse (2523315), we get a palindrome (53855835).

It can be divided in two parts, 513 and 32520, that added together give a palindrome (33033).

The spelling of 51332520 in words is "fifty-one million, three hundred thirty-two thousand, five hundred twenty".