311543240535311 has 4 divisors (see below), whose sum is σ = 311543287209624. Its totient is φ = 311543193861000.

The previous prime is 311543240535301. The next prime is 311543240535337. The reversal of 311543240535311 is 113535042345113.

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-311543240535311 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 (311543240535301) 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, 11231840 + ... + 27372261.

It is an arithmetic number, because the mean of its divisors is an integer number (77885821802406).

Almost surely, 2^{311543240535311} is an apocalyptic number.

311543240535311 is a deficient number, since it is larger than the sum of its proper divisors (46674313).

311543240535311 is an equidigital number, since it uses as much as digits as its factorization.

311543240535311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46674312.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 311543240535311 in words is "three hundred eleven trillion, five hundred forty-three billion, two hundred forty million, five hundred thirty-five thousand, three hundred eleven".