22100222 has 4 divisors (see below), whose sum is σ = 33150336. Its totient is φ = 11050110.

The previous prime is 22100219. The next prime is 22100227. The reversal of 22100222 is 22200122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22100227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5525054 + ... + 5525057.

It is an arithmetic number, because the mean of its divisors is an integer number (8287584).

Almost surely, 2^22100222 is an apocalyptic number.

22100222 is a deficient number, since it is larger than the sum of its proper divisors (11050114).

22100222 is a wasteful number, since it uses less digits than its factorization.

22100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11050113.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22100222 is about 4701.0873210354. The cubic root of 22100222 is about 280.6287824947.

Adding to 22100222 its reverse (22200122), we get a palindrome (44300344).

It can be divided in two parts, 22100 and 222, that added together give a palindrome (22322).

The spelling of 22100222 in words is "twenty-two million, one hundred thousand, two hundred twenty-two".