211502133 has 12 divisors (see below), whose sum is σ = 316038060. Its totient is φ = 136139136.

The previous prime is 211502111. The next prime is 211502141. The reversal of 211502133 is 331205112.

It can be written as a sum of positive squares in 2 ways, for example, as 77475204 + 134026929 = 8802^2 + 11577^2 .

It is not a de Polignac number, because 211502133 - 2⁶ = 211502069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211502143) 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 in 11 ways as a sum of consecutive naturals, for example, 404916 + ... + 405437.

It is an arithmetic number, because the mean of its divisors is an integer number (26336505).

Almost surely, 2^211502133 is an apocalyptic number.

It is an amenable number.

211502133 is a deficient number, since it is larger than the sum of its proper divisors (104535927).

211502133 is a wasteful number, since it uses less digits than its factorization.

211502133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810388 (or 810385 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 211502133 is about 14543.1129061147. The cubic root of 211502133 is about 595.8060614356.

Adding to 211502133 its reverse (331205112), we get a palindrome (542707245).

The spelling of 211502133 in words is "two hundred eleven million, five hundred two thousand, one hundred thirty-three".