22005224 has 8 divisors (see below), whose sum is σ = 41259810. Its totient is φ = 11002608.

The previous prime is 22005199. The next prime is 22005241. The reversal of 22005224 is 42250022.

It can be written as a sum of positive squares in only one way, i.e., 21921124 + 84100 = 4682^2 + 290^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1375319 + ... + 1375334.

Almost surely, 2^22005224 is an apocalyptic number.

It is an amenable number.

22005224 is a deficient number, since it is larger than the sum of its proper divisors (19254586).

22005224 is a wasteful number, since it uses less digits than its factorization.

22005224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2750659 (or 2750655 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 22005224 is about 4690.9726070400. The cubic root of 22005224 is about 280.2261098762.

Adding to 22005224 its reverse (42250022), we get a palindrome (64255246).

It can be divided in two parts, 2200522 and 4, that multiplied together give a palindrome (8802088).

The spelling of 22005224 in words is "twenty-two million, five thousand, two hundred twenty-four".