221634222 has 16 divisors (see below), whose sum is σ = 446245200. Its totient is φ = 73381952.

The previous prime is 221634209. The next prime is 221634223. The reversal of 221634222 is 222436122.

It is a happy number.

221634222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221634192 and 221634201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221634223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123063 + ... + 124850.

It is an arithmetic number, because the mean of its divisors is an integer number (27890325).

Almost surely, 2^221634222 is an apocalyptic number.

221634222 is an abundant number, since it is smaller than the sum of its proper divisors (224610978).

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

221634222 is a wasteful number, since it uses less digits than its factorization.

221634222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248067.

The product of its digits is 2304, while the sum is 24.

The square root of 221634222 is about 14887.3846595028. The cubic root of 221634222 is about 605.1721587330.

The spelling of 221634222 in words is "two hundred twenty-one million, six hundred thirty-four thousand, two hundred twenty-two".