13157559202225 has 27 divisors (see below), whose sum is σ = 16381919402721. Its totient is φ = 10483288336800.

The previous prime is 13157559202201. The next prime is 13157559202273. The reversal of 13157559202225 is 52220295575131.

The square root of 13157559202225 is 3627335.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6646202588529 + 6511356613696 = 2578023^2 + 2551736^2 .

It is not a de Polignac number, because 13157559202225 - 2¹³ = 13157559194033 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4915037587 + ... + 4915040263.

Almost surely, 2^{13157559202225} is an apocalyptic number.

13157559202225 is the 3627335-th square number.

13157559202225 is the 1813668-th centered octagonal number.

It is an amenable number.

13157559202225 is a deficient number, since it is larger than the sum of its proper divisors (3224360200496).

13157559202225 is an frugal number, since it uses more digits than its factorization.

13157559202225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906 (or 2953 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 49.

Multiplying 13157559202225 by its sum of digits (49), we get a square (644720400909025 = 25391345²).

The spelling of 13157559202225 in words is "thirteen trillion, one hundred fifty-seven billion, five hundred fifty-nine million, two hundred two thousand, two hundred twenty-five".