22228891 has 6 divisors (see below), whose sum is σ = 22970076. Its totient is φ = 21510900.

The previous prime is 22228883. The next prime is 22228901. The reversal of 22228891 is 19882222.

It is a happy number.

It is not a de Polignac number, because 22228891 - 2³ = 22228883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22228831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10605 + ... + 12526.

It is an arithmetic number, because the mean of its divisors is an integer number (3828346).

Almost surely, 2^22228891 is an apocalyptic number.

22228891 is a deficient number, since it is larger than the sum of its proper divisors (741185).

22228891 is an equidigital number, since it uses as much as digits as its factorization.

22228891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23193 (or 23162 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 22228891 is about 4714.7524855500. The cubic root of 22228891 is about 281.1723422796.

The spelling of 22228891 in words is "twenty-two million, two hundred twenty-eight thousand, eight hundred ninety-one".