22181344 has 12 divisors (see below), whose sum is σ = 43669584. Its totient is φ = 11090656.

The previous prime is 22181339. The next prime is 22181347. The reversal of 22181344 is 44318122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22181347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346552 + ... + 346615.

It is an arithmetic number, because the mean of its divisors is an integer number (3639132).

Almost surely, 2^22181344 is an apocalyptic number.

It is an amenable number.

22181344 is a deficient number, since it is larger than the sum of its proper divisors (21488240).

22181344 is an equidigital number, since it uses as much as digits as its factorization.

22181344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693177 (or 693169 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 22181344 is about 4709.7074219106. The cubic root of 22181344 is about 280.9717258144.

Adding to 22181344 its reverse (44318122), we get a palindrome (66499466).

The spelling of 22181344 in words is "twenty-two million, one hundred eighty-one thousand, three hundred forty-four".