311321330230213 has 16 divisors (see below), whose sum is σ = 313033455123840. Its totient is φ = 309613638587904.

The previous prime is 311321330230199. The next prime is 311321330230279. The reversal of 311321330230213 is 312032033123113.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311321330230213 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 (311321330230613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379861570 + ... + 380680252.

It is an arithmetic number, because the mean of its divisors is an integer number (19564590945240).

Almost surely, 2^{311321330230213} is an apocalyptic number.

It is an amenable number.

311321330230213 is a deficient number, since it is larger than the sum of its proper divisors (1712124893627).

311321330230213 is a wasteful number, since it uses less digits than its factorization.

311321330230213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 821388.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 311321330230213 its reverse (312032033123113), we get a palindrome (623353363353326).

The spelling of 311321330230213 in words is "three hundred eleven trillion, three hundred twenty-one billion, three hundred thirty million, two hundred thirty thousand, two hundred thirteen".