15555235225 has 12 divisors (see below), whose sum is σ = 20127122496. Its totient is φ = 11903136080.

The previous prime is 15555235219. The next prime is 15555235261. The reversal of 15555235225 is 52253255551.

It is not a de Polignac number, because 15555235225 - 2⁷ = 15555235097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13525717 + ... + 13526866.

It is an arithmetic number, because the mean of its divisors is an integer number (1677260208).

Almost surely, 2^15555235225 is an apocalyptic number.

It is an amenable number.

15555235225 is a deficient number, since it is larger than the sum of its proper divisors (4571887271).

15555235225 is a wasteful number, since it uses less digits than its factorization.

15555235225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27052616 (or 27052611 counting only the distinct ones).

The product of its digits is 375000, while the sum is 40.

The spelling of 15555235225 in words is "fifteen billion, five hundred fifty-five million, two hundred thirty-five thousand, two hundred twenty-five".