213234311 has 4 divisors (see below), whose sum is σ = 222505392. Its totient is φ = 203963232.

The previous prime is 213234269. The next prime is 213234341. The reversal of 213234311 is 113432312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213234311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213234341) 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, 4635506 + ... + 4635551.

It is an arithmetic number, because the mean of its divisors is an integer number (55626348).

Almost surely, 2^213234311 is an apocalyptic number.

213234311 is a deficient number, since it is larger than the sum of its proper divisors (9271081).

213234311 is an equidigital number, since it uses as much as digits as its factorization.

213234311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9271080.

The product of its digits is 432, while the sum is 20.

The square root of 213234311 is about 14602.5446755009. The cubic root of 213234311 is about 597.4281687427.

Adding to 213234311 its reverse (113432312), we get a palindrome (326666623).

The spelling of 213234311 in words is "two hundred thirteen million, two hundred thirty-four thousand, three hundred eleven".