812851219 has 2 divisors, whose sum is σ = 812851220. Its totient is φ = 812851218.

The previous prime is 812851157. The next prime is 812851253. The reversal of 812851219 is 912158218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812851219 - 2¹³ = 812843027 is a prime.

It is a super-2 number, since 2×812851219² = 1321454208459571922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (812801219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406425609 + 406425610.

It is an arithmetic number, because the mean of its divisors is an integer number (406425610).

Almost surely, 2^812851219 is an apocalyptic number.

812851219 is a deficient number, since it is larger than the sum of its proper divisors (1).

812851219 is an equidigital number, since it uses as much as digits as its factorization.

812851219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 37.

The square root of 812851219 is about 28510.5457506516. The cubic root of 812851219 is about 933.2622240751.

The spelling of 812851219 in words is "eight hundred twelve million, eight hundred fifty-one thousand, two hundred nineteen".