22042242 has 24 divisors (see below), whose sum is σ = 50272560. Its totient is φ = 6960600.

The previous prime is 22042231. The next prime is 22042243. The reversal of 22042242 is 24224022.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22042243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31884 + ... + 32567.

It is an arithmetic number, because the mean of its divisors is an integer number (2094690).

Almost surely, 2^22042242 is an apocalyptic number.

22042242 is an abundant number, since it is smaller than the sum of its proper divisors (28230318).

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

22042242 is a wasteful number, since it uses less digits than its factorization.

22042242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64478 (or 64475 counting only the distinct ones).

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

The square root of 22042242 is about 4694.9166126780. The cubic root of 22042242 is about 280.3831574136.

Adding to 22042242 its reverse (24224022), we get a palindrome (46266264).

The spelling of 22042242 in words is "twenty-two million, forty-two thousand, two hundred forty-two".