15520056 has 16 divisors (see below), whose sum is σ = 38800200. Its totient is φ = 5173344.

The previous prime is 15520049. The next prime is 15520061. The reversal of 15520056 is 65002551.

15520056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 646669 = 15520056 / (1 + 5 + 5 + 2 + 0 + 0 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323311 + ... + 323358.

Almost surely, 2^15520056 is an apocalyptic number.

It is an amenable number.

15520056 is an abundant number, since it is smaller than the sum of its proper divisors (23280144).

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

15520056 is a wasteful number, since it uses less digits than its factorization.

15520056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646678 (or 646674 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 15520056 is about 3939.5502281352. The cubic root of 15520056 is about 249.4390409077.

The spelling of 15520056 in words is "fifteen million, five hundred twenty thousand, fifty-six".