442221222 has 16 divisors (see below), whose sum is σ = 888145920. Its totient is φ = 146789832.

The previous prime is 442221217. The next prime is 442221233. The reversal of 442221222 is 222122244.

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, 152758 + ... + 155625.

It is an arithmetic number, because the mean of its divisors is an integer number (55509120).

Almost surely, 2^442221222 is an apocalyptic number.

442221222 is an abundant number, since it is smaller than the sum of its proper divisors (445924698).

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

442221222 is a wasteful number, since it uses less digits than its factorization.

442221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308627.

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

The square root of 442221222 is about 21029.0566122211. The cubic root of 442221222 is about 761.8682235046.

Adding to 442221222 its reverse (222122244), we get a palindrome (664343466).

The spelling of 442221222 in words is "four hundred forty-two million, two hundred twenty-one thousand, two hundred twenty-two".