2211822 has 24 divisors (see below), whose sum is σ = 4842864. Its totient is φ = 729504.

The previous prime is 2211821. The next prime is 2211883. The reversal of 2211822 is 2281122.

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 = 2211795 and 2211804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1258 + ... + 2450.

It is an arithmetic number, because the mean of its divisors is an integer number (201786).

2^2211822 is an apocalyptic number.

2211822 is an abundant number, since it is smaller than the sum of its proper divisors (2631042).

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

2211822 is a wasteful number, since it uses less digits than its factorization.

2211822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1301 counting only the distinct ones).

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

The square root of 2211822 is about 1487.2195533949. The cubic root of 2211822 is about 130.2916921558.

Adding to 2211822 its reverse (2281122), we get a palindrome (4492944).

The spelling of 2211822 in words is "two million, two hundred eleven thousand, eight hundred twenty-two".