163220056 has 16 divisors (see below), whose sum is σ = 306192600. Its totient is φ = 81568704.

The previous prime is 163220027. The next prime is 163220063. The reversal of 163220056 is 650022361.

It is a self number, because there is not a number n which added to its sum of digits gives 163220056.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17436 + ... + 25108.

Almost surely, 2^163220056 is an apocalyptic number.

It is an amenable number.

163220056 is a deficient number, since it is larger than the sum of its proper divisors (142972544).

163220056 is a wasteful number, since it uses less digits than its factorization.

163220056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338 (or 10334 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 163220056 is about 12775.7604861707. The cubic root of 163220056 is about 546.5012682915.

The spelling of 163220056 in words is "one hundred sixty-three million, two hundred twenty thousand, fifty-six".