22031222 has 32 divisors (see below), whose sum is σ = 36220800. Its totient is φ = 10015488.

The previous prime is 22031209. The next prime is 22031237. The reversal of 22031222 is 22213022.

It is a junction number, because it is equal to n+sod(n) for n = 22031197 and 22031206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158429 + ... + 158567.

It is an arithmetic number, because the mean of its divisors is an integer number (1131900).

Almost surely, 2^22031222 is an apocalyptic number.

22031222 is a deficient number, since it is larger than the sum of its proper divisors (14189578).

22031222 is a wasteful number, since it uses less digits than its factorization.

22031222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22031222 is about 4693.7428561863. The cubic root of 22031222 is about 280.3364238515.

Adding to 22031222 its reverse (22213022), we get a palindrome (44244244).

The spelling of 22031222 in words is "twenty-two million, thirty-one thousand, two hundred twenty-two".