13513645225 has 6 divisors (see below), whose sum is σ = 16756920110. Its totient is φ = 10810916160.

The previous prime is 13513645213. The next prime is 13513645231. The reversal of 13513645225 is 52254631531.

It can be written as a sum of positive squares in 3 ways, for example, as 174319209 + 13339326016 = 13203^2 + 115496^2 .

It is not a de Polignac number, because 13513645225 - 2⁷ = 13513645097 is a prime.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 270272880 + ... + 270272929.

Almost surely, 2^13513645225 is an apocalyptic number.

It is an amenable number.

13513645225 is a deficient number, since it is larger than the sum of its proper divisors (3243274885).

13513645225 is an equidigital number, since it uses as much as digits as its factorization.

13513645225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540545819 (or 540545814 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The spelling of 13513645225 in words is "thirteen billion, five hundred thirteen million, six hundred forty-five thousand, two hundred twenty-five".