521013525 has 12 divisors (see below), whose sum is σ = 861409152. Its totient is φ = 277873840.

The previous prime is 521013491. The next prime is 521013551. The reversal of 521013525 is 525310125.

It is a happy number.

It is not a de Polignac number, because 521013525 - 2⁶ = 521013461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521013495 and 521013504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3473349 + ... + 3473498.

It is an arithmetic number, because the mean of its divisors is an integer number (71784096).

Almost surely, 2^521013525 is an apocalyptic number.

It is an amenable number.

521013525 is a deficient number, since it is larger than the sum of its proper divisors (340395627).

521013525 is a wasteful number, since it uses less digits than its factorization.

521013525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946860 (or 6946855 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 521013525 is about 22825.7206896080. The cubic root of 521013525 is about 804.6672621485.

The spelling of 521013525 in words is "five hundred twenty-one million, thirteen thousand, five hundred twenty-five".