812211 has 4 divisors (see below), whose sum is σ = 1082952. Its totient is φ = 541472.

The previous prime is 812191. The next prime is 812213. The reversal of 812211 is 112218.

812211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 812211 - 2⁵ = 812179 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (812213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135366 + ... + 135371.

It is an arithmetic number, because the mean of its divisors is an integer number (270738).

2⁸¹²²¹¹ is an apocalyptic number.

812211 is a deficient number, since it is larger than the sum of its proper divisors (270741).

812211 is a wasteful number, since it uses less digits than its factorization.

812211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270740.

The product of its digits is 32, while the sum is 15.

The square root of 812211 is about 901.2274962516. The cubic root of 812211 is about 93.3017140625.

Adding to 812211 its reverse (112218), we get a palindrome (924429).

The spelling of 812211 in words is "eight hundred twelve thousand, two hundred eleven".