521550325 has 12 divisors (see below), whose sum is σ = 655583908. Its totient is φ = 411523200.

The previous prime is 521550307. The next prime is 521550329. The reversal of 521550325 is 523055125.

It can be written as a sum of positive squares in 6 ways, for example, as 28976689 + 492573636 = 5383^2 + 22194^2 .

It is not a de Polignac number, because 521550325 - 2⁹ = 521549813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521550293 and 521550302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521550329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141066 + ... + 144715.

Almost surely, 2^521550325 is an apocalyptic number.

It is an amenable number.

521550325 is a deficient number, since it is larger than the sum of its proper divisors (134033583).

521550325 is a wasteful number, since it uses less digits than its factorization.

521550325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285864 (or 285859 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 521550325 is about 22837.4763273003. The cubic root of 521550325 is about 804.9435167344.

The spelling of 521550325 in words is "five hundred twenty-one million, five hundred fifty thousand, three hundred twenty-five".