222343218 has 80 divisors (see below), whose sum is σ = 511847424. Its totient is φ = 72122400.

The previous prime is 222343213. The next prime is 222343223. The reversal of 222343218 is 812343222.

222343218 is a `hidden beast` number, since 2 + 223 + 432 + 1 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (222343213) and next prime (222343223).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 222343191 and 222343200.

It is not an unprimeable number, because it can be changed into a prime (222343213) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1750671 + ... + 1750797.

Almost surely, 2^222343218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222343218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255923712).

222343218 is an abundant number, since it is smaller than the sum of its proper divisors (289504206).

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

222343218 is a wasteful number, since it uses less digits than its factorization.

222343218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 340 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 222343218 is about 14911.1776194907. The cubic root of 222343218 is about 605.8167762912.

It can be divided in two parts, 22234 and 3218, that added together give a palindrome (25452).

The spelling of 222343218 in words is "two hundred twenty-two million, three hundred forty-three thousand, two hundred eighteen".