13156225 has 6 divisors (see below), whose sum is σ = 16313750. Its totient is φ = 10524960.

The previous prime is 13156163. The next prime is 13156259. The reversal of 13156225 is 52265131.

13156225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 368449 + 12787776 = 607^2 + 3576^2 .

It is not a de Polignac number, because 13156225 - 2⁷ = 13156097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 526249 = 13156225 / (1 + 3 + 1 + 5 + 6 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 13156225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263100 + ... + 263149.

Almost surely, 2^13156225 is an apocalyptic number.

It is an amenable number.

13156225 is a deficient number, since it is larger than the sum of its proper divisors (3157525).

13156225 is an equidigital number, since it uses as much as digits as its factorization.

13156225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526259 (or 526254 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 13156225 is about 3627.1510859075. The cubic root of 13156225 is about 236.0716111803.

The spelling of 13156225 in words is "thirteen million, one hundred fifty-six thousand, two hundred twenty-five".