812223 has 6 divisors (see below), whose sum is σ = 1173224. Its totient is φ = 541476.

The previous prime is 812221. The next prime is 812233. The reversal of 812223 is 322218.

It is a happy number.

It is not a de Polignac number, because 812223 - 2¹ = 812221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812196 and 812205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45115 + ... + 45132.

2⁸¹²²²³ is an apocalyptic number.

812223 is a deficient number, since it is larger than the sum of its proper divisors (361001).

812223 is a wasteful number, since it uses less digits than its factorization.

812223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90253 (or 90250 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 812223 is about 901.2341538135. The cubic root of 812223 is about 93.3021735552.

It can be divided in two parts, 81222 and 3, that added together give a square (81225 = 285²).

The spelling of 812223 in words is "eight hundred twelve thousand, two hundred twenty-three".