15664255 has 16 divisors (see below), whose sum is σ = 19714464. Its totient is φ = 11934720.

The previous prime is 15664249. The next prime is 15664261. The reversal of 15664255 is 55246651.

It is an interprime number because it is at equal distance from previous prime (15664249) and next prime (15664261).

It is not a de Polignac number, because 15664255 - 2⁵ = 15664223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15664255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7927 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (1232154).

Almost surely, 2^15664255 is an apocalyptic number.

15664255 is a deficient number, since it is larger than the sum of its proper divisors (4050209).

15664255 is a wasteful number, since it uses less digits than its factorization.

15664255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866.

The product of its digits is 36000, while the sum is 34.

The square root of 15664255 is about 3957.8093688302. The cubic root of 15664255 is about 250.2091849179.

The spelling of 15664255 in words is "fifteen million, six hundred sixty-four thousand, two hundred fifty-five".