135216211 has 8 divisors (see below), whose sum is σ = 146039600. Its totient is φ = 124453152.

The previous prime is 135216173. The next prime is 135216223. The reversal of 135216211 is 112612531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135216211 - 2⁷ = 135216083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135216311) 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 7 ways as a sum of consecutive naturals, for example, 10365 + ... + 19438.

It is an arithmetic number, because the mean of its divisors is an integer number (18254950).

Almost surely, 2^135216211 is an apocalyptic number.

135216211 is a deficient number, since it is larger than the sum of its proper divisors (10823389).

135216211 is a wasteful number, since it uses less digits than its factorization.

135216211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30165.

The product of its digits is 360, while the sum is 22.

The square root of 135216211 is about 11628.2505562961. The cubic root of 135216211 is about 513.2665013442.

Adding to 135216211 its reverse (112612531), we get a palindrome (247828742).

The spelling of 135216211 in words is "one hundred thirty-five million, two hundred sixteen thousand, two hundred eleven".