22204242 has 12 divisors (see below), whose sum is σ = 48109230. Its totient is φ = 7401408.

The previous prime is 22204241. The next prime is 22204249. The reversal of 22204242 is 24240222.

It can be written as a sum of positive squares in only one way, i.e., 13329801 + 8874441 = 3651^2 + 2979^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1233569 = 22204242 / (2 + 2 + 2 + 0 + 4 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (22204241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 616767 + ... + 616802.

Almost surely, 2^22204242 is an apocalyptic number.

22204242 is an abundant number, since it is smaller than the sum of its proper divisors (25904988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22204242 is a wasteful number, since it uses less digits than its factorization.

22204242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233577 (or 1233574 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 22204242 is about 4712.1377314336. The cubic root of 22204242 is about 281.0683757739.

Adding to 22204242 its reverse (24240222), we get a palindrome (46444464).

The spelling of 22204242 in words is "twenty-two million, two hundred four thousand, two hundred forty-two".