22131222 has 8 divisors (see below), whose sum is σ = 44262456. Its totient is φ = 7377072.

The previous prime is 22131211. The next prime is 22131223. The reversal of 22131222 is 22213122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

22131222 is an admirable number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1844263 + ... + 1844274.

It is an arithmetic number, because the mean of its divisors is an integer number (5532807).

Almost surely, 2^22131222 is an apocalyptic number.

22131222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22131222 is a wasteful number, since it uses less digits than its factorization.

22131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3688542.

The product of its digits is 96, while the sum is 15.

The square root of 22131222 is about 4704.3832752020. The cubic root of 22131222 is about 280.7599339349.

Adding to 22131222 its reverse (22213122), we get a palindrome (44344344).

It can be divided in two parts, 2213122 and 2, that multiplied together give a palindrome (4426244).

The spelling of 22131222 in words is "twenty-two million, one hundred thirty-one thousand, two hundred twenty-two".