15564955 has 8 divisors (see below), whose sum is σ = 21346272. Its totient is φ = 10673088.

The previous prime is 15564949. The next prime is 15564961. The reversal of 15564955 is 55946551.

15564955 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15564949) and next prime (15564961).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15564955 - 2¹⁹ = 15040667 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222322 + ... + 222391.

It is an arithmetic number, because the mean of its divisors is an integer number (2668284).

Almost surely, 2^15564955 is an apocalyptic number.

15564955 is a deficient number, since it is larger than the sum of its proper divisors (5781317).

15564955 is an equidigital number, since it uses as much as digits as its factorization.

15564955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444725.

The product of its digits is 135000, while the sum is 40.

The square root of 15564955 is about 3945.2446058515. The cubic root of 15564955 is about 249.6793489073.

The spelling of 15564955 in words is "fifteen million, five hundred sixty-four thousand, nine hundred fifty-five".