22220222 has 4 divisors (see below), whose sum is σ = 33330336. Its totient is φ = 11110110.

The previous prime is 22220213. The next prime is 22220227. The reversal of 22220222 is 22202222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 22220197 and 22220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555054 + ... + 5555057.

It is an arithmetic number, because the mean of its divisors is an integer number (8332584).

Almost surely, 2^22220222 is an apocalyptic number.

22220222 is a deficient number, since it is larger than the sum of its proper divisors (11110114).

22220222 is a wasteful number, since it uses less digits than its factorization.

22220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11110113.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22220222 is about 4713.8330475315. The cubic root of 22220222 is about 281.1357862504.

Adding to 22220222 its reverse (22202222), we get a palindrome (44422444).

It can be divided in two parts, 2 and 2220222, that multiplied together give a palindrome (4440444).

The spelling of 22220222 in words is "twenty-two million, two hundred twenty thousand, two hundred twenty-two".