521025232 has 160 divisors (see below), whose sum is σ = 1298528000. Its totient is φ = 201180672.

The previous prime is 521025227. The next prime is 521025257. The reversal of 521025232 is 232520125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4779994 + ... + 4780102.

It is an arithmetic number, because the mean of its divisors is an integer number (8115800).

Almost surely, 2^521025232 is an apocalyptic number.

521025232 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521025232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (649264000).

521025232 is an abundant number, since it is smaller than the sum of its proper divisors (777502768).

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

521025232 is a wasteful number, since it uses less digits than its factorization.

521025232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 521025232 is about 22825.9771313300. The cubic root of 521025232 is about 804.6732889716.

Adding to 521025232 its reverse (232520125), we get a palindrome (753545357).

The spelling of 521025232 in words is "five hundred twenty-one million, twenty-five thousand, two hundred thirty-two".