22224222 has 24 divisors (see below), whose sum is σ = 48288240. Its totient is φ = 7387200.

The previous prime is 22224217. The next prime is 22224229. The reversal of 22224222 is 22242222.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 22224195 and 22224204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5679 + ... + 8757.

It is an arithmetic number, because the mean of its divisors is an integer number (2012010).

Almost surely, 2^22224222 is an apocalyptic number.

22224222 is an abundant number, since it is smaller than the sum of its proper divisors (26064018).

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

22224222 is a wasteful number, since it uses less digits than its factorization.

22224222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3488 (or 3485 counting only the distinct ones).

The product of its digits is 512, while the sum is 18.

The square root of 22224222 is about 4714.2573116028. The cubic root of 22224222 is about 281.1526549038.

Adding to 22224222 its reverse (22242222), we get a palindrome (44466444).

It can be divided in two parts, 2 and 2224222, that multiplied together give a palindrome (4448444).

The spelling of 22224222 in words is "twenty-two million, two hundred twenty-four thousand, two hundred twenty-two".