812231 has 16 divisors (see below), whose sum is σ = 1013760. Its totient is φ = 635040.

The previous prime is 812221. The next prime is 812233. The reversal of 812231 is 132218.

812231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812231 - 2⁶ = 812167 is a prime.

It is a super-2 number, since 2×812231² = 1319438394722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4025 + ... + 4221.

It is an arithmetic number, because the mean of its divisors is an integer number (63360).

2⁸¹²²³¹ is an apocalyptic number.

812231 is a deficient number, since it is larger than the sum of its proper divisors (201529).

812231 is a wasteful number, since it uses less digits than its factorization.

812231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254.

The product of its digits is 96, while the sum is 17.

The square root of 812231 is about 901.2385921608. The cubic root of 812231 is about 93.3024798812.

Adding to 812231 its reverse (132218), we get a palindrome (944449).

The spelling of 812231 in words is "eight hundred twelve thousand, two hundred thirty-one".