22153444 has 6 divisors (see below), whose sum is σ = 38768534. Its totient is φ = 11076720.

The previous prime is 22153423. The next prime is 22153451. The reversal of 22153444 is 44435122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 2439844 = 4440^2 + 1562^2 .

It is a super-2 number, since 2×22153444² = 981550162122272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2769177 + ... + 2769184.

Almost surely, 2^22153444 is an apocalyptic number.

It is an amenable number.

22153444 is a deficient number, since it is larger than the sum of its proper divisors (16615090).

22153444 is a wasteful number, since it uses less digits than its factorization.

22153444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5538365 (or 5538363 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 22153444 is about 4706.7445224911. The cubic root of 22153444 is about 280.8538730194.

Adding to 22153444 its reverse (44435122), we get a palindrome (66588566).

The spelling of 22153444 in words is "twenty-two million, one hundred fifty-three thousand, four hundred forty-four".