15331664 has 20 divisors (see below), whose sum is σ = 29787156. Its totient is φ = 7644672.

The previous prime is 15331661. The next prime is 15331711. The reversal of 15331664 is 46613351.

It is a happy number.

15331664 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 2 ways, for example, as 9610000 + 5721664 = 3100^2 + 2392^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15331661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5822 + ... + 8034.

Almost surely, 2^15331664 is an apocalyptic number.

It is an amenable number.

15331664 is a deficient number, since it is larger than the sum of its proper divisors (14455492).

15331664 is a wasteful number, since it uses less digits than its factorization.

15331664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654 (or 2648 counting only the distinct ones).

The product of its digits is 6480, while the sum is 29.

The square root of 15331664 is about 3915.5668810531. The cubic root of 15331664 is about 248.4256478056.

The spelling of 15331664 in words is "fifteen million, three hundred thirty-one thousand, six hundred sixty-four".