22222242 has 32 divisors (see below), whose sum is σ = 56438400. Its totient is φ = 6349104.

The previous prime is 22222223. The next prime is 22222253. The reversal of 22222242 is 24222222.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29017 + ... + 29772.

It is an arithmetic number, because the mean of its divisors is an integer number (1763700).

Almost surely, 2^22222242 is an apocalyptic number.

22222242 is an abundant number, since it is smaller than the sum of its proper divisors (34216158).

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

22222242 is a wasteful number, since it uses less digits than its factorization.

22222242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58807 (or 58801 counting only the distinct ones).

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

The square root of 22222242 is about 4714.0473056600. The cubic root of 22222242 is about 281.1443051733.

Adding to 22222242 its reverse (24222222), we get a palindrome (46444464).

The spelling of 22222242 in words is "twenty-two million, two hundred twenty-two thousand, two hundred forty-two".