311343322231 has 4 divisors (see below), whose sum is σ = 311427268600. Its totient is φ = 311259375864.

The previous prime is 311343322223. The next prime is 311343322273. The reversal of 311343322231 is 132223343113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132223343113 = 173 ⋅764296781.

It is a cyclic number.

It is not a de Polignac number, because 311343322231 - 2³ = 311343322223 is a prime.

It is a super-2 number, since 2×311343322231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311343322231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311343322201) 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, 41967621 + ... + 41975038.

It is an arithmetic number, because the mean of its divisors is an integer number (77856817150).

Almost surely, 2^311343322231 is an apocalyptic number.

311343322231 is a deficient number, since it is larger than the sum of its proper divisors (83946369).

311343322231 is an equidigital number, since it uses as much as digits as its factorization.

311343322231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83946368.

The product of its digits is 7776, while the sum is 28.

Adding to 311343322231 its reverse (132223343113), we get a palindrome (443566665344).

The spelling of 311343322231 in words is "three hundred eleven billion, three hundred forty-three million, three hundred twenty-two thousand, two hundred thirty-one".