211323223 has 2 divisors, whose sum is σ = 211323224. Its totient is φ = 211323222.

The previous prime is 211323173. The next prime is 211323239. The reversal of 211323223 is 322323112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211323223 - 2⁹ = 211322711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211323223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211323253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105661611 + 105661612.

It is an arithmetic number, because the mean of its divisors is an integer number (105661612).

Almost surely, 2^211323223 is an apocalyptic number.

211323223 is a deficient number, since it is larger than the sum of its proper divisors (1).

211323223 is an equidigital number, since it uses as much as digits as its factorization.

211323223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 211323223 is about 14536.9605832856. The cubic root of 211323223 is about 595.6380162697.

Adding to 211323223 its reverse (322323112), we get a palindrome (533646335).

It can be divided in two parts, 2 and 11323223, that added together give a square (11323225 = 3365²).

The spelling of 211323223 in words is "two hundred eleven million, three hundred twenty-three thousand, two hundred twenty-three".