22222118 has 8 divisors (see below), whose sum is σ = 33677112. Its totient is φ = 10996416.

The previous prime is 22222097. The next prime is 22222129. The reversal of 22222118 is 81122222.

It is a happy number.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22222118.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57080 + ... + 57467.

It is an arithmetic number, because the mean of its divisors is an integer number (4209639).

Almost surely, 2^22222118 is an apocalyptic number.

22222118 is a deficient number, since it is larger than the sum of its proper divisors (11454994).

22222118 is a wasteful number, since it uses less digits than its factorization.

22222118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114646.

The product of its digits is 256, while the sum is 20.

The square root of 22222118 is about 4714.0341534613. The cubic root of 22222118 is about 281.1437822444.

The spelling of 22222118 in words is "twenty-two million, two hundred twenty-two thousand, one hundred eighteen".