521521125325 has 12 divisors (see below), whose sum is σ = 653952335220. Its totient is φ = 412529068160.

The previous prime is 521521125319. The next prime is 521521125347. The reversal of 521521125325 is 523521125125.

It can be written as a sum of positive squares in 6 ways, for example, as 57713816169 + 463807309156 = 240237^2 + 681034^2 .

It is not a de Polignac number, because 521521125325 - 2¹⁵ = 521521092557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117193534 + ... + 117197983.

It is an arithmetic number, because the mean of its divisors is an integer number (54496027935).

Almost surely, 2^521521125325 is an apocalyptic number.

It is an amenable number.

521521125325 is a deficient number, since it is larger than the sum of its proper divisors (132431209895).

521521125325 is a wasteful number, since it uses less digits than its factorization.

521521125325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234391616 (or 234391611 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The spelling of 521521125325 in words is "five hundred twenty-one billion, five hundred twenty-one million, one hundred twenty-five thousand, three hundred twenty-five".