211312233 has 20 divisors (see below), whose sum is σ = 344362128. Its totient is φ = 128067480.

The previous prime is 211312223. The next prime is 211312249. The reversal of 211312233 is 332213112.

211312233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211312233 - 2¹⁰ = 211311209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211312223) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 117691 + ... + 119472.

Almost surely, 2^211312233 is an apocalyptic number.

It is an amenable number.

211312233 is a deficient number, since it is larger than the sum of its proper divisors (133049895).

211312233 is a wasteful number, since it uses less digits than its factorization.

211312233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237186 (or 237177 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 211312233 is about 14536.5825763829. The cubic root of 211312233 is about 595.6276905782.

Adding to 211312233 its reverse (332213112), we get a palindrome (543525345).

The spelling of 211312233 in words is "two hundred eleven million, three hundred twelve thousand, two hundred thirty-three".