22205444 has 6 divisors (see below), whose sum is σ = 38859534. Its totient is φ = 11102720.

The previous prime is 22205441. The next prime is 22205453. The reversal of 22205444 is 44450222.

It can be written as a sum of positive squares in only one way, i.e., 22202944 + 2500 = 4712^2 + 50^2 .

It is not an unprimeable number, because it can be changed into a prime (22205441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775677 + ... + 2775684.

It is an arithmetic number, because the mean of its divisors is an integer number (6476589).

Almost surely, 2^22205444 is an apocalyptic number.

It is an amenable number.

22205444 is a deficient number, since it is larger than the sum of its proper divisors (16654090).

22205444 is a wasteful number, since it uses less digits than its factorization.

22205444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551365 (or 5551363 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 22205444 is about 4712.2652726688. The cubic root of 22205444 is about 281.0734474488.

Adding to 22205444 its reverse (44450222), we get a palindrome (66655666).

It can be divided in two parts, 22205 and 444, that multiplied together give a triangular number (9859020 = T₄₄₄₀).

The spelling of 22205444 in words is "twenty-two million, two hundred five thousand, four hundred forty-four".