222218730 has 96 divisors (see below), whose sum is σ = 622045008. Its totient is φ = 54835200.

The previous prime is 222218719. The next prime is 222218753. The reversal of 222218730 is 37812222.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 7273809 + 214944921 = 2697^2 + 14661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222218694 and 222218703.

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 47 ways as a sum of consecutive naturals, for example, 92140 + ... + 94520.

Almost surely, 2^222218730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222218730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311022504).

222218730 is an abundant number, since it is smaller than the sum of its proper divisors (399826278).

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

222218730 is a wasteful number, since it uses less digits than its factorization.

222218730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472 (or 2469 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 222218730 is about 14907.0027168442. The cubic root of 222218730 is about 605.7036913663.

The spelling of 222218730 in words is "two hundred twenty-two million, two hundred eighteen thousand, seven hundred thirty".