213133111 has 8 divisors (see below), whose sum is σ = 223632864. Its totient is φ = 202736160.

The previous prime is 213133079. The next prime is 213133117. The reversal of 213133111 is 111331312.

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 213133111 - 2⁵ = 213133079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213133117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21436 + ... + 29761.

It is an arithmetic number, because the mean of its divisors is an integer number (27954108).

Almost surely, 2^213133111 is an apocalyptic number.

213133111 is a deficient number, since it is larger than the sum of its proper divisors (10499753).

213133111 is a wasteful number, since it uses less digits than its factorization.

213133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51401.

The product of its digits is 54, while the sum is 16.

The square root of 213133111 is about 14599.0791147935. The cubic root of 213133111 is about 597.3336415884. Note that the first 3 decimals are identical.

Adding to 213133111 its reverse (111331312), we get a palindrome (324464423).

The spelling of 213133111 in words is "two hundred thirteen million, one hundred thirty-three thousand, one hundred eleven".