211422133 has 4 divisors (see below), whose sum is σ = 227685388. Its totient is φ = 195158880.

The previous prime is 211422119. The next prime is 211422137. The reversal of 211422133 is 331224112.

It is a happy number.

211422133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47018449 + 164403684 = 6857^2 + 12822^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211422133 is a prime.

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 211422133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211422137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8131608 + ... + 8131633.

It is an arithmetic number, because the mean of its divisors is an integer number (56921347).

Almost surely, 2^211422133 is an apocalyptic number.

It is an amenable number.

211422133 is a deficient number, since it is larger than the sum of its proper divisors (16263255).

211422133 is a wasteful number, since it uses less digits than its factorization.

211422133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16263254.

The product of its digits is 288, while the sum is 19.

The square root of 211422133 is about 14540.3622031915. The cubic root of 211422133 is about 595.7309313882.

Adding to 211422133 its reverse (331224112), we get a palindrome (542646245).

The spelling of 211422133 in words is "two hundred eleven million, four hundred twenty-two thousand, one hundred thirty-three".