15565056 has 72 divisors (see below), whose sum is σ = 44640960. Its totient is φ = 4786176.

The previous prime is 15565031. The next prime is 15565061. The reversal of 15565056 is 65056551.

It is a nialpdrome in base 16.

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, 9205 + ... + 10763.

Almost surely, 2^15565056 is an apocalyptic number.

15565056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15565056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22320480).

15565056 is an abundant number, since it is smaller than the sum of its proper divisors (29075904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15565056 is a wasteful number, since it uses less digits than its factorization.

15565056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591 (or 1577 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 15565056 is about 3945.2574060510. The cubic root of 15565056 is about 249.6798889573.

The spelling of 15565056 in words is "fifteen million, five hundred sixty-five thousand, fifty-six".