812143232210 has 16 divisors (see below), whose sum is σ = 1461870521496. Its totient is φ = 324854469888.

The previous prime is 812143232207. The next prime is 812143232213. The reversal of 812143232210 is 12232341218.

It is an interprime number because it is at equal distance from previous prime (812143232207) and next prime (812143232213).

It can be written as a sum of positive squares in 4 ways, for example, as 489413575561 + 322729656649 = 699581^2 + 568093^2 .

It is not an unprimeable number, because it can be changed into a prime (812143232213) 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, 1167242 + ... + 1728218.

Almost surely, 2^812143232210 is an apocalyptic number.

812143232210 is a deficient number, since it is larger than the sum of its proper divisors (649727289286).

812143232210 is a wasteful number, since it uses less digits than its factorization.

812143232210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705757.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 812143232210 its reverse (12232341218), we get a palindrome (824375573428).

The spelling of 812143232210 in words is "eight hundred twelve billion, one hundred forty-three million, two hundred thirty-two thousand, two hundred ten".