22251344 has 10 divisors (see below), whose sum is σ = 43112010. Its totient is φ = 11125664.

The previous prime is 22251343. The next prime is 22251367. The reversal of 22251344 is 44315222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22202944 + 48400 = 4712^2 + 220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22251343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695339 + ... + 695370.

It is an arithmetic number, because the mean of its divisors is an integer number (4311201).

Almost surely, 2^22251344 is an apocalyptic number.

It is an amenable number.

22251344 is a deficient number, since it is larger than the sum of its proper divisors (20860666).

22251344 is a wasteful number, since it uses less digits than its factorization.

22251344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390717 (or 1390711 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 22251344 is about 4717.1330275921. The cubic root of 22251344 is about 281.2669794523.

Adding to 22251344 its reverse (44315222), we get a palindrome (66566566).

The spelling of 22251344 in words is "twenty-two million, two hundred fifty-one thousand, three hundred forty-four".