222444138 has 32 divisors (see below), whose sum is σ = 519266304. Its totient is φ = 62202672.

The previous prime is 222444137. The next prime is 222444143. The reversal of 222444138 is 831444222.

It is not an unprimeable number, because it can be changed into a prime (222444137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54370 + ... + 58317.

It is an arithmetic number, because the mean of its divisors is an integer number (16227072).

Almost surely, 2^222444138 is an apocalyptic number.

222444138 is an abundant number, since it is smaller than the sum of its proper divisors (296822166).

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

222444138 is a wasteful number, since it uses less digits than its factorization.

222444138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112746.

The product of its digits is 12288, while the sum is 30.

The square root of 222444138 is about 14914.5612741374. The cubic root of 222444138 is about 605.9084210642.

The spelling of 222444138 in words is "two hundred twenty-two million, four hundred forty-four thousand, one hundred thirty-eight".