22821222 has 16 divisors (see below), whose sum is σ = 45713520. Its totient is φ = 7595232.

The previous prime is 22821203. The next prime is 22821229. The reversal of 22821222 is 22212822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22821229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1804 + ... + 6992.

It is an arithmetic number, because the mean of its divisors is an integer number (2857095).

Almost surely, 2^22821222 is an apocalyptic number.

22821222 is an abundant number, since it is smaller than the sum of its proper divisors (22892298).

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

22821222 is a wasteful number, since it uses less digits than its factorization.

22821222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5927.

The product of its digits is 512, while the sum is 21.

The square root of 22821222 is about 4777.1562670694. The cubic root of 22821222 is about 283.6479387385.

Subtracting from 22821222 its reverse (22212822), we obtain a square (608400 = 780²).

The spelling of 22821222 in words is "twenty-two million, eight hundred twenty-one thousand, two hundred twenty-two".