13633225 has 6 divisors (see below), whose sum is σ = 16905230. Its totient is φ = 10906560.

The previous prime is 13633223. The next prime is 13633229. The reversal of 13633225 is 52233631.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 112896 + 13520329 = 336^2 + 3677^2 .

It is not a de Polignac number, because 13633225 - 2¹ = 13633223 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: 545329 = 13633225 / (1 + 3 + 6 + 3 + 3 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 13633225.

It is not an unprimeable number, because it can be changed into a prime (13633223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 272640 + ... + 272689.

Almost surely, 2^13633225 is an apocalyptic number.

It is an amenable number.

13633225 is a deficient number, since it is larger than the sum of its proper divisors (3272005).

13633225 is an equidigital number, since it uses as much as digits as its factorization.

13633225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545339 (or 545334 counting only the distinct ones).

The product of its digits is 3240, while the sum is 25.

The square root of 13633225 is about 3692.3197315509. The cubic root of 13633225 is about 238.8908601083.

Adding to 13633225 its reverse (52233631), we get a palindrome (65866856).

The spelling of 13633225 in words is "thirteen million, six hundred thirty-three thousand, two hundred twenty-five".