222222168 has 96 divisors (see below), whose sum is σ = 690792960. Its totient is φ = 63218880.

The previous prime is 222222149. The next prime is 222222193. The reversal of 222222168 is 861222222.

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 135771 + ... + 137397.

It is an arithmetic number, because the mean of its divisors is an integer number (7195760).

Almost surely, 2^222222168 is an apocalyptic number.

222222168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222222168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345396480).

222222168 is an abundant number, since it is smaller than the sum of its proper divisors (468570792).

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

222222168 is a wasteful number, since it uses less digits than its factorization.

222222168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917 (or 1910 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 222222168 is about 14907.1180313299. The cubic root of 222222168 is about 605.7068150132.

The spelling of 222222168 in words is "two hundred twenty-two million, two hundred twenty-two thousand, one hundred sixty-eight".