211323311 has 16 divisors (see below), whose sum is σ = 232098048. Its totient is φ = 191539200.

The previous prime is 211323289. The next prime is 211323323. The reversal of 211323311 is 113323112.

211323311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 211323311 - 2¹⁸ = 211061167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211323311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211323611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121931 + ... + 123651.

It is an arithmetic number, because the mean of its divisors is an integer number (14506128).

Almost surely, 2^211323311 is an apocalyptic number.

211323311 is a deficient number, since it is larger than the sum of its proper divisors (20774737).

211323311 is a wasteful number, since it uses less digits than its factorization.

211323311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002.

The product of its digits is 108, while the sum is 17.

The square root of 211323311 is about 14536.9636100528. The cubic root of 211323311 is about 595.6380989490.

Adding to 211323311 its reverse (113323112), we get a palindrome (324646423).

The spelling of 211323311 in words is "two hundred eleven million, three hundred twenty-three thousand, three hundred eleven".