221442222 has 16 divisors (see below), whose sum is σ = 450391680. Its totient is φ = 72562872.

The previous prime is 221442209. The next prime is 221442227. The reversal of 221442222 is 222244122.

221442222 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 not an unprimeable number, because it can be changed into a prime (221442227) 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, 312418 + ... + 313125.

It is an arithmetic number, because the mean of its divisors is an integer number (28149480).

Almost surely, 2^221442222 is an apocalyptic number.

221442222 is an abundant number, since it is smaller than the sum of its proper divisors (228949458).

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

221442222 is a wasteful number, since it uses less digits than its factorization.

221442222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625607.

The product of its digits is 1024, while the sum is 21.

The square root of 221442222 is about 14880.9348496659. The cubic root of 221442222 is about 604.9973562710.

Adding to 221442222 its reverse (222244122), we get a palindrome (443686344).

The spelling of 221442222 in words is "two hundred twenty-one million, four hundred forty-two thousand, two hundred twenty-two".