22144244 has 6 divisors (see below), whose sum is σ = 38752434. Its totient is φ = 11072120.

The previous prime is 22144219. The next prime is 22144247. The reversal of 22144244 is 44244122.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 1532644 = 4540^2 + 1238^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22144247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2768027 + ... + 2768034.

It is an arithmetic number, because the mean of its divisors is an integer number (6458739).

Almost surely, 2^22144244 is an apocalyptic number.

It is an amenable number.

22144244 is a deficient number, since it is larger than the sum of its proper divisors (16608190).

22144244 is a wasteful number, since it uses less digits than its factorization.

22144244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536065 (or 5536063 counting only the distinct ones).

The product of its digits is 2048, while the sum is 23.

The square root of 22144244 is about 4705.7671000592. The cubic root of 22144244 is about 280.8149894732.

Adding to 22144244 its reverse (44244122), we get a palindrome (66388366).

The spelling of 22144244 in words is "twenty-two million, one hundred forty-four thousand, two hundred forty-four".