222221222 has 16 divisors (see below), whose sum is σ = 336655872. Its totient is φ = 110008200.

The previous prime is 222221221. The next prime is 222221227. The reversal of 222221222 is 222122222.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 222221222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93347 + ... + 95697.

It is an arithmetic number, because the mean of its divisors is an integer number (21040992).

Almost surely, 2^222221222 is an apocalyptic number.

222221222 is a deficient number, since it is larger than the sum of its proper divisors (114434650).

222221222 is a wasteful number, since it uses less digits than its factorization.

222221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803.

The product of its digits is 256, while the sum is 17.

The square root of 222221222 is about 14907.0863014876. The cubic root of 222221222 is about 605.7059555138.

Adding to 222221222 its reverse (222122222), we get a palindrome (444343444).

It can be divided in two parts, 22 and 2221222, that multiplied together give a palindrome (48866884).

The spelling of 222221222 in words is "two hundred twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".