311030112243 has 4 divisors (see below), whose sum is σ = 414706816328. Its totient is φ = 207353408160.

The previous prime is 311030112187. The next prime is 311030112247. The reversal of 311030112243 is 342211030113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342211030113 = 3 ⋅114070343371.

It is not a de Polignac number, because 311030112243 - 2¹⁸ = 311029850099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311030112247) 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, 51838352038 + ... + 51838352043.

It is an arithmetic number, because the mean of its divisors is an integer number (103676704082).

Almost surely, 2^311030112243 is an apocalyptic number.

311030112243 is a deficient number, since it is larger than the sum of its proper divisors (103676704085).

311030112243 is a wasteful number, since it uses less digits than its factorization.

311030112243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103676704084.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 311030112243 its reverse (342211030113), we get a palindrome (653241142356).

The spelling of 311030112243 in words is "three hundred eleven billion, thirty million, one hundred twelve thousand, two hundred forty-three".