311331031313 has 8 divisors (see below), whose sum is σ = 315727683840. Its totient is φ = 306934704160.

The previous prime is 311331031279. The next prime is 311331031327. The reversal of 311331031313 is 313130133113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311331031313 is a prime.

It is a super-2 number, since 2×311331031313² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311331031373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2358773 + ... + 2487261.

It is an arithmetic number, because the mean of its divisors is an integer number (39465960480).

Almost surely, 2^311331031313 is an apocalyptic number.

It is an amenable number.

311331031313 is a deficient number, since it is larger than the sum of its proper divisors (4396652527).

311331031313 is a wasteful number, since it uses less digits than its factorization.

311331031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162687.

The product of its (nonzero) digits is 729, while the sum is 23.

Adding to 311331031313 its reverse (313130133113), we get a palindrome (624461164426).

The spelling of 311331031313 in words is "three hundred eleven billion, three hundred thirty-one million, thirty-one thousand, three hundred thirteen".