22221204 has 24 divisors (see below), whose sum is σ = 52829280. Its totient is φ = 7267104.

The previous prime is 22221191. The next prime is 22221209. The reversal of 22221204 is 40212222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16834 + ... + 18105.

It is an arithmetic number, because the mean of its divisors is an integer number (2201220).

Almost surely, 2^22221204 is an apocalyptic number.

It is an amenable number.

22221204 is an abundant number, since it is smaller than the sum of its proper divisors (30608076).

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

22221204 is a wasteful number, since it uses less digits than its factorization.

22221204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34999 (or 34997 counting only the distinct ones).

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

The square root of 22221204 is about 4713.9372078974. The cubic root of 22221204 is about 281.1399276923.

Adding to 22221204 its reverse (40212222), we get a palindrome (62433426).

The spelling of 22221204 in words is "twenty-two million, two hundred twenty-one thousand, two hundred four".