521364441225 has 12 divisors (see below), whose sum is σ = 861989209616. Its totient is φ = 278061035280.

The previous prime is 521364441223. The next prime is 521364441229. The reversal of 521364441225 is 522144463125.

It is not a de Polignac number, because 521364441225 - 2¹ = 521364441223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521364441223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3475762867 + ... + 3475763016.

Almost surely, 2^521364441225 is an apocalyptic number.

It is an amenable number.

521364441225 is a deficient number, since it is larger than the sum of its proper divisors (340624768391).

521364441225 is a wasteful number, since it uses less digits than its factorization.

521364441225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6951525896 (or 6951525891 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The spelling of 521364441225 in words is "five hundred twenty-one billion, three hundred sixty-four million, four hundred forty-one thousand, two hundred twenty-five".