22252212 has 24 divisors (see below), whose sum is σ = 57691200. Its totient is φ = 7417368.

The previous prime is 22252189. The next prime is 22252213. The reversal of 22252212 is 21225222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22252213) 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, 102912 + ... + 103127.

It is an arithmetic number, because the mean of its divisors is an integer number (2403800).

Almost surely, 2^22252212 is an apocalyptic number.

It is an amenable number.

22252212 is an abundant number, since it is smaller than the sum of its proper divisors (35438988).

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

22252212 is a wasteful number, since it uses less digits than its factorization.

22252212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206052 (or 206044 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 22252212 is about 4717.2250317321. The cubic root of 22252212 is about 281.2706367080.

Adding to 22252212 its reverse (21225222), we get a palindrome (43477434).

The spelling of 22252212 in words is "twenty-two million, two hundred fifty-two thousand, two hundred twelve".