213113211 has 4 divisors (see below), whose sum is σ = 284150952. Its totient is φ = 142075472.

The previous prime is 213113179. The next prime is 213113231. The reversal of 213113211 is 112311312.

It is a happy number.

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 213113211 - 2⁵ = 213113179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213113231) 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, 35518866 + ... + 35518871.

It is an arithmetic number, because the mean of its divisors is an integer number (71037738).

Almost surely, 2^213113211 is an apocalyptic number.

213113211 is a deficient number, since it is larger than the sum of its proper divisors (71037741).

213113211 is an equidigital number, since it uses as much as digits as its factorization.

213113211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71037740.

The product of its digits is 36, while the sum is 15.

The square root of 213113211 is about 14598.3975490463. The cubic root of 213113211 is about 597.3150502186.

Adding to 213113211 its reverse (112311312), we get a palindrome (325424523).

The spelling of 213113211 in words is "two hundred thirteen million, one hundred thirteen thousand, two hundred eleven".