213311311313 has 4 divisors (see below), whose sum is σ = 213312652980. Its totient is φ = 213309969648.

The previous prime is 213311311307. The next prime is 213311311321. The reversal of 213311311313 is 313113113312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29250576784 + 184060734529 = 171028^2 + 429023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213311311313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213311311363) 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, 394370 + ... + 762987.

It is an arithmetic number, because the mean of its divisors is an integer number (53328163245).

Almost surely, 2^213311311313 is an apocalyptic number.

It is an amenable number.

213311311313 is a deficient number, since it is larger than the sum of its proper divisors (1341667).

213311311313 is a wasteful number, since it uses less digits than its factorization.

213311311313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341666.

The product of its digits is 486, while the sum is 23.

Adding to 213311311313 its reverse (313113113312), we get a palindrome (526424424625).

The spelling of 213311311313 in words is "two hundred thirteen billion, three hundred eleven million, three hundred eleven thousand, three hundred thirteen".