221765222 has 16 divisors (see below), whose sum is σ = 380374272. Its totient is φ = 94990920.

The previous prime is 221765189. The next prime is 221765231. The reversal of 221765222 is 222567122.

221765222 is digitally balanced in base 3, because in such base 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 7 ways as a sum of consecutive naturals, for example, 35033 + ... + 40875.

It is an arithmetic number, because the mean of its divisors is an integer number (23773392).

Almost surely, 2^221765222 is an apocalyptic number.

221765222 is a deficient number, since it is larger than the sum of its proper divisors (158609050).

221765222 is a wasteful number, since it uses less digits than its factorization.

221765222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563.

The product of its digits is 6720, while the sum is 29.

The square root of 221765222 is about 14891.7837078034. The cubic root of 221765222 is about 605.2913670662.

The spelling of 221765222 in words is "two hundred twenty-one million, seven hundred sixty-five thousand, two hundred twenty-two".