221110056 has 24 divisors (see below), whose sum is σ = 598839930. Its totient is φ = 73703328.

The previous prime is 221110033. The next prime is 221110061. The reversal of 221110056 is 650011122.

221110056 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 216972900 + 4137156 = 14730^2 + 2034^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1535415 + ... + 1535558.

Almost surely, 2^221110056 is an apocalyptic number.

It is an amenable number.

221110056 is an abundant number, since it is smaller than the sum of its proper divisors (377729874).

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

221110056 is a wasteful number, since it uses less digits than its factorization.

221110056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070985 (or 3070978 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 221110056 is about 14869.7698704452. The cubic root of 221110056 is about 604.6947037861.

Adding to 221110056 its reverse (650011122), we get a palindrome (871121178).

The spelling of 221110056 in words is "two hundred twenty-one million, one hundred ten thousand, fifty-six".