520351525 has 6 divisors (see below), whose sum is σ = 645235922. Its totient is φ = 416281200.

The previous prime is 520351493. The next prime is 520351543. The reversal of 520351525 is 525153025.

It can be written as a sum of positive squares in 3 ways, for example, as 9998244 + 510353281 = 3162^2 + 22591^2 .

It is not a de Polignac number, because 520351525 - 2⁵ = 520351493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520351493 and 520351502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10407006 + ... + 10407055.

Almost surely, 2^520351525 is an apocalyptic number.

It is an amenable number.

520351525 is a deficient number, since it is larger than the sum of its proper divisors (124884397).

520351525 is a wasteful number, since it uses less digits than its factorization.

520351525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20814071 (or 20814066 counting only the distinct ones).

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

The square root of 520351525 is about 22811.2148953097. The cubic root of 520351525 is about 804.3263141863.

The spelling of 520351525 in words is "five hundred twenty million, three hundred fifty-one thousand, five hundred twenty-five".