15664325 has 12 divisors (see below), whose sum is σ = 19576128. Its totient is φ = 12433200.

The previous prime is 15664289. The next prime is 15664339. The reversal of 15664325 is 52346651.

15664325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15664325 - 2⁶ = 15664261 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15664291 and 15664300.

It is a congruent number.

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, 884 + ... + 5666.

It is an arithmetic number, because the mean of its divisors is an integer number (1631344).

Almost surely, 2^15664325 is an apocalyptic number.

It is an amenable number.

15664325 is a deficient number, since it is larger than the sum of its proper divisors (3911803).

15664325 is a wasteful number, since it uses less digits than its factorization.

15664325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924 (or 4919 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 15664325 is about 3957.8182120962. The cubic root of 15664325 is about 250.2095576267.

The spelling of 15664325 in words is "fifteen million, six hundred sixty-four thousand, three hundred twenty-five".