8211222 has 24 divisors (see below), whose sum is σ = 17853264. Its totient is φ = 2727504.

The previous prime is 8211197. The next prime is 8211227. The reversal of 8211222 is 2221128.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 8211195 and 8211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8211227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6103 + ... + 7325.

It is an arithmetic number, because the mean of its divisors is an integer number (743886).

Almost surely, 2^8211222 is an apocalyptic number.

8211222 is an abundant number, since it is smaller than the sum of its proper divisors (9642042).

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

8211222 is a wasteful number, since it uses less digits than its factorization.

8211222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604 (or 1601 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 8211222 is about 2865.5229889149. The cubic root of 8211222 is about 201.7449154111.

The spelling of 8211222 in words is "eight million, two hundred eleven thousand, two hundred twenty-two".