22211444 has 6 divisors (see below), whose sum is σ = 38870034. Its totient is φ = 11105720.

The previous prime is 22211429. The next prime is 22211447. The reversal of 22211444 is 44411222.

It can be written as a sum of positive squares in only one way, i.e., 21270544 + 940900 = 4612^2 + 970^2 .

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

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2776427 + ... + 2776434.

It is an arithmetic number, because the mean of its divisors is an integer number (6478339).

Almost surely, 2^22211444 is an apocalyptic number.

It is an amenable number.

22211444 is a deficient number, since it is larger than the sum of its proper divisors (16658590).

22211444 is a wasteful number, since it uses less digits than its factorization.

22211444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5552865 (or 5552863 counting only the distinct ones).

The product of its digits is 512, while the sum is 20.

The square root of 22211444 is about 4712.9018661542. The cubic root of 22211444 is about 281.0987608932.

Adding to 22211444 its reverse (44411222), we get a palindrome (66622666).

The spelling of 22211444 in words is "twenty-two million, two hundred eleven thousand, four hundred forty-four".