812323218 has 16 divisors (see below), whose sum is σ = 1856738880. Its totient is φ = 232092336.

The previous prime is 812323157. The next prime is 812323219.

812323218 is nontrivially palindromic in base 10.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (812323219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9670473 + ... + 9670556.

It is an arithmetic number, because the mean of its divisors is an integer number (116046180).

Almost surely, 2^812323218 is an apocalyptic number.

812323218 is an abundant number, since it is smaller than the sum of its proper divisors (1044415662).

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

812323218 is a wasteful number, since it uses less digits than its factorization.

812323218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19341041.

The product of its digits is 4608, while the sum is 30.

The square root of 812323218 is about 28501.2844973696. The cubic root of 812323218 is about 933.0601083173.

The spelling of 812323218 in words is "eight hundred twelve million, three hundred twenty-three thousand, two hundred eighteen".