13663225 has 12 divisors (see below), whose sum is σ = 16991100. Its totient is φ = 10899200.

The previous prime is 13663217. The next prime is 13663231. The reversal of 13663225 is 52236631.

It can be written as a sum of positive squares in 6 ways, for example, as 2809 + 13660416 = 53^2 + 3696^2 .

It is not a de Polignac number, because 13663225 - 2³ = 13663217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13663193 and 13663202.

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, 12501 + ... + 13549.

It is an arithmetic number, because the mean of its divisors is an integer number (1415925).

Almost surely, 2^13663225 is an apocalyptic number.

It is an amenable number.

13663225 is a deficient number, since it is larger than the sum of its proper divisors (3327875).

13663225 is a wasteful number, since it uses less digits than its factorization.

13663225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580 (or 1575 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 13663225 is about 3696.3799858781. The cubic root of 13663225 is about 239.0659586980.

Adding to 13663225 its reverse (52236631), we get a palindrome (65899856).

The spelling of 13663225 in words is "thirteen million, six hundred sixty-three thousand, two hundred twenty-five".