222262221 has 8 divisors (see below), whose sum is σ = 296622720. Its totient is φ = 148038272.

The previous prime is 222262217. The next prime is 222262237. The reversal of 222262221 is 122262222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222262221 - 2² = 222262217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222262241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30276 + ... + 36893.

It is an arithmetic number, because the mean of its divisors is an integer number (37077840).

Almost surely, 2^222262221 is an apocalyptic number.

It is an amenable number.

222262221 is a deficient number, since it is larger than the sum of its proper divisors (74360499).

222262221 is a wasteful number, since it uses less digits than its factorization.

222262221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68275.

The product of its digits is 768, while the sum is 21.

The square root of 222262221 is about 14908.4613894258. The cubic root of 222262221 is about 605.7432033986.

Subtracting from 222262221 its reverse (122262222), we obtain a palindrome (99999999).

The spelling of 222262221 in words is "two hundred twenty-two million, two hundred sixty-two thousand, two hundred twenty-one".