213133211 has 4 divisors (see below), whose sum is σ = 218331624. Its totient is φ = 207934800.

The previous prime is 213133177. The next prime is 213133213. The reversal of 213133211 is 112331312.

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

It is a cyclic number.

It is not a de Polignac number, because 213133211 - 2⁶ = 213133147 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 213133211.

It is not an unprimeable number, because it can be changed into a prime (213133213) 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, 2599145 + ... + 2599226.

It is an arithmetic number, because the mean of its divisors is an integer number (54582906).

Almost surely, 2^213133211 is an apocalyptic number.

213133211 is a deficient number, since it is larger than the sum of its proper divisors (5198413).

213133211 is an equidigital number, since it uses as much as digits as its factorization.

213133211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5198412.

The product of its digits is 108, while the sum is 17.

The square root of 213133211 is about 14599.0825396667. The cubic root of 213133211 is about 597.3337350094. Note that the first 3 decimals are identical.

Adding to 213133211 its reverse (112331312), we get a palindrome (325464523).

The spelling of 213133211 in words is "two hundred thirteen million, one hundred thirty-three thousand, two hundred eleven".