13663325 has 24 divisors (see below), whose sum is σ = 19326888. Its totient is φ = 9492480.

The previous prime is 13663319. The next prime is 13663327. The reversal of 13663325 is 52336631.

It is a happy number.

13663325 is digitally balanced in base 3, 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 12 ways, for example, as 2627641 + 11035684 = 1621^2 + 3322^2 .

It is not a de Polignac number, because 13663325 - 2¹² = 13659229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13663327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4289 + ... + 6761.

It is an arithmetic number, because the mean of its divisors is an integer number (805287).

Almost surely, 2^13663325 is an apocalyptic number.

It is an amenable number.

13663325 is a deficient number, since it is larger than the sum of its proper divisors (5663563).

13663325 is a wasteful number, since it uses less digits than its factorization.

13663325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513 (or 2508 counting only the distinct ones).

The product of its digits is 9720, while the sum is 29.

The square root of 13663325 is about 3696.3935126012. The cubic root of 13663325 is about 239.0665419312.

Adding to 13663325 its reverse (52336631), we get a palindrome (65999956).

The spelling of 13663325 in words is "thirteen million, six hundred sixty-three thousand, three hundred twenty-five".