521712670025 has 24 divisors (see below), whose sum is σ = 669993617664. Its totient is φ = 402736476800.

The previous prime is 521712670019. The next prime is 521712670027. The reversal of 521712670025 is 520076217125.

It is not a de Polignac number, because 521712670025 - 2²⁰ = 521711621449 is a prime.

It is a super-2 number, since 2×521712670025² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521712670027) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 3043412 + ... + 3210261.

It is an arithmetic number, because the mean of its divisors is an integer number (27916400736).

Almost surely, 2^521712670025 is an apocalyptic number.

It is an amenable number.

521712670025 is a deficient number, since it is larger than the sum of its proper divisors (148280947639).

521712670025 is a wasteful number, since it uses less digits than its factorization.

521712670025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253801 (or 6253796 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 521712670025 in words is "five hundred twenty-one billion, seven hundred twelve million, six hundred seventy thousand, twenty-five".