211304133 has 10 divisors (see below), whose sum is σ = 315651974. Its totient is φ = 140869368.

The previous prime is 211304129. The next prime is 211304141. The reversal of 211304133 is 331403112.

211304133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 209178369 + 2125764 = 14463^2 + 1458^2 .

It is not a de Polignac number, because 211304133 - 2² = 211304129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211304113) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1304266 + ... + 1304427.

Almost surely, 2^211304133 is an apocalyptic number.

It is an amenable number.

211304133 is a deficient number, since it is larger than the sum of its proper divisors (104347841).

211304133 is an equidigital number, since it uses as much as digits as its factorization.

211304133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608705 (or 2608696 counting only the distinct ones).

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

The square root of 211304133 is about 14536.3039662770. The cubic root of 211304133 is about 595.6200799666.

Adding to 211304133 its reverse (331403112), we get a palindrome (542707245).

The spelling of 211304133 in words is "two hundred eleven million, three hundred four thousand, one hundred thirty-three".