13521425225 has 96 divisors (see below), whose sum is σ = 21588499200. Its totient is φ = 8155468800.

The previous prime is 13521425213. The next prime is 13521425233. The reversal of 13521425225 is 52252412531.

It is not a de Polignac number, because 13521425225 - 2⁴ = 13521425209 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13521425191 and 13521425200.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16310111 + ... + 16310939.

It is an arithmetic number, because the mean of its divisors is an integer number (224880200).

Almost surely, 2^13521425225 is an apocalyptic number.

It is an amenable number.

13521425225 is a deficient number, since it is larger than the sum of its proper divisors (8067073975).

13521425225 is a wasteful number, since it uses less digits than its factorization.

13521425225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123 (or 1118 counting only the distinct ones).

The product of its digits is 24000, while the sum is 32.

Adding to 13521425225 its reverse (52252412531), we get a palindrome (65773837756).

The spelling of 13521425225 in words is "thirteen billion, five hundred twenty-one million, four hundred twenty-five thousand, two hundred twenty-five".