521057106 has 24 divisors (see below), whose sum is σ = 1195367004. Its totient is φ = 163468800.

The previous prime is 521057093. The next prime is 521057113. The reversal of 521057106 is 601750125.

It can be written as a sum of positive squares in 2 ways, for example, as 506655081 + 14402025 = 22509^2 + 3795^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 521057106.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 851095 + ... + 851706.

Almost surely, 2^521057106 is an apocalyptic number.

521057106 is an abundant number, since it is smaller than the sum of its proper divisors (674309898).

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

521057106 is a wasteful number, since it uses less digits than its factorization.

521057106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702826 (or 1702823 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 521057106 is about 22826.6753163924. The cubic root of 521057106 is about 804.6896974114.

The spelling of 521057106 in words is "five hundred twenty-one million, fifty-seven thousand, one hundred six".