805318223 has 2 divisors, whose sum is σ = 805318224. Its totient is φ = 805318222.

The previous prime is 805318219. The next prime is 805318243. The reversal of 805318223 is 322813508.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 805318223 - 2² = 805318219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 805318223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805318243) 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, 402659111 + 402659112.

It is an arithmetic number, because the mean of its divisors is an integer number (402659112).

Almost surely, 2^805318223 is an apocalyptic number.

805318223 is a deficient number, since it is larger than the sum of its proper divisors (1).

805318223 is an equidigital number, since it uses as much as digits as its factorization.

805318223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 805318223 is about 28378.1293076200. The cubic root of 805318223 is about 930.3703088451.

The spelling of 805318223 in words is "eight hundred five million, three hundred eighteen thousand, two hundred twenty-three".