22142244 has 12 divisors (see below), whose sum is σ = 51665264. Its totient is φ = 7380744.

The previous prime is 22142231. The next prime is 22142257. The reversal of 22142244 is 44224122.

It is an interprime number because it is at equal distance from previous prime (22142231) and next prime (22142257).

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22142244.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 922582 + ... + 922605.

Almost surely, 2^22142244 is an apocalyptic number.

It is an amenable number.

22142244 is an abundant number, since it is smaller than the sum of its proper divisors (29523020).

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

22142244 is a wasteful number, since it uses less digits than its factorization.

22142244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845194 (or 1845192 counting only the distinct ones).

The product of its digits is 1024, while the sum is 21.

The square root of 22142244 is about 4705.5545900563. The cubic root of 22142244 is about 280.8065351033.

Adding to 22142244 its reverse (44224122), we get a palindrome (66366366).

The spelling of 22142244 in words is "twenty-two million, one hundred forty-two thousand, two hundred forty-four".