15220056 has 16 divisors (see below), whose sum is σ = 38050200. Its totient is φ = 5073344.

The previous prime is 15220031. The next prime is 15220067. The reversal of 15220056 is 65002251.

15220056 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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, 317061 + ... + 317108.

Almost surely, 2^15220056 is an apocalyptic number.

It is an amenable number.

15220056 is an abundant number, since it is smaller than the sum of its proper divisors (22830144).

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

15220056 is a wasteful number, since it uses less digits than its factorization.

15220056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634178 (or 634174 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 15220056 is about 3901.2890177479. The cubic root of 15220056 is about 247.8213680689.

The spelling of 15220056 in words is "fifteen million, two hundred twenty thousand, fifty-six".