222218811 has 24 divisors (see below), whose sum is σ = 329971824. Its totient is φ = 144023040.

The previous prime is 222218809. The next prime is 222218869. The reversal of 222218811 is 118812222.

It is not a de Polignac number, because 222218811 - 2¹ = 222218809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222218011) 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 23 ways as a sum of consecutive naturals, for example, 123460 + ... + 125246.

It is an arithmetic number, because the mean of its divisors is an integer number (13748826).

Almost surely, 2^222218811 is an apocalyptic number.

222218811 is a deficient number, since it is larger than the sum of its proper divisors (107753013).

222218811 is a wasteful number, since it uses less digits than its factorization.

222218811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171 (or 2168 counting only the distinct ones).

The product of its digits is 1024, while the sum is 27.

The square root of 222218811 is about 14907.0054336879. The cubic root of 222218811 is about 605.7037649604.

The spelling of 222218811 in words is "two hundred twenty-two million, two hundred eighteen thousand, eight hundred eleven".