213311312323 has 4 divisors (see below), whose sum is σ = 213312380688. Its totient is φ = 213310243960.

The previous prime is 213311312317. The next prime is 213311312327. The reversal of 213311312323 is 323213113312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311312323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213311312327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135511 + ... + 667072.

It is an arithmetic number, because the mean of its divisors is an integer number (53328095172).

Almost surely, 2^213311312323 is an apocalyptic number.

213311312323 is a deficient number, since it is larger than the sum of its proper divisors (1068365).

213311312323 is an equidigital number, since it uses as much as digits as its factorization.

213311312323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068364.

The product of its digits is 1944, while the sum is 25.

Adding to 213311312323 its reverse (323213113312), we get a palindrome (536524425635).

The spelling of 213311312323 in words is "two hundred thirteen billion, three hundred eleven million, three hundred twelve thousand, three hundred twenty-three".