811222 has 4 divisors (see below), whose sum is σ = 1216836. Its totient is φ = 405610.

The previous prime is 811207. The next prime is 811231. The reversal of 811222 is 222118.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×811222² = 1316162266568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 811196 and 811205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202804 + ... + 202807.

It is an arithmetic number, because the mean of its divisors is an integer number (304209).

2⁸¹¹²²² is an apocalyptic number.

811222 is a deficient number, since it is larger than the sum of its proper divisors (405614).

811222 is a wasteful number, since it uses less digits than its factorization.

811222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405613.

The product of its digits is 64, while the sum is 16.

The square root of 811222 is about 900.6786330318. The cubic root of 811222 is about 93.2638286387.

The spelling of 811222 in words is "eight hundred eleven thousand, two hundred twenty-two".