22222122 has 16 divisors (see below), whose sum is σ = 47863200. Its totient is φ = 6837552.

The previous prime is 22222097. The next prime is 22222129. The reversal of 22222122 is 22122222.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (22222129) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 142372 + ... + 142527.

It is an arithmetic number, because the mean of its divisors is an integer number (2991450).

Almost surely, 2^22222122 is an apocalyptic number.

22222122 is an abundant number, since it is smaller than the sum of its proper divisors (25641078).

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

22222122 is a wasteful number, since it uses less digits than its factorization.

22222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284917.

The product of its digits is 128, while the sum is 15.

The square root of 22222122 is about 4714.0345777264. The cubic root of 22222122 is about 281.1437991131.

Adding to 22222122 its reverse (22122222), we get a palindrome (44344344).

The spelling of 22222122 in words is "twenty-two million, two hundred twenty-two thousand, one hundred twenty-two".