222117643 has 12 divisors (see below), whose sum is σ = 244544440. Its totient is φ = 201595680.

The previous prime is 222117613. The next prime is 222117667. The reversal of 222117643 is 346711222.

It is a de Polignac number, because none of the positive numbers 2^k-222117643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222117613) 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 11 ways as a sum of consecutive naturals, for example, 102871 + ... + 105007.

Almost surely, 2^222117643 is an apocalyptic number.

222117643 is a deficient number, since it is larger than the sum of its proper divisors (22426797).

222117643 is a wasteful number, since it uses less digits than its factorization.

222117643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018 (or 3007 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 222117643 is about 14903.6117434667. The cubic root of 222117643 is about 605.6118328392.

Adding to 222117643 its reverse (346711222), we get a palindrome (568828865).

The spelling of 222117643 in words is "two hundred twenty-two million, one hundred seventeen thousand, six hundred forty-three".