22142444 has 6 divisors (see below), whose sum is σ = 38749284. Its totient is φ = 11071220.

The previous prime is 22142423. The next prime is 22142447. The reversal of 22142444 is 44424122.

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

It is not an unprimeable number, because it can be changed into a prime (22142447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2767802 + ... + 2767809.

It is an arithmetic number, because the mean of its divisors is an integer number (6458214).

Almost surely, 2^22142444 is an apocalyptic number.

It is an amenable number.

22142444 is a deficient number, since it is larger than the sum of its proper divisors (16606840).

22142444 is a wasteful number, since it uses less digits than its factorization.

22142444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535615 (or 5535613 counting only the distinct ones).

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

The square root of 22142444 is about 4705.5758414885. The cubic root of 22142444 is about 280.8073805632.

Adding to 22142444 its reverse (44424122), we get a palindrome (66566566).

The spelling of 22142444 in words is "twenty-two million, one hundred forty-two thousand, four hundred forty-four".