311011323431 has 4 divisors (see below), whose sum is σ = 311013592512. Its totient is φ = 311009054352.

The previous prime is 311011323409. The next prime is 311011323439. The reversal of 311011323431 is 134323110113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134323110113 = 67 ⋅2004822539.

It is a cyclic number.

It is not a de Polignac number, because 311011323431 - 2⁶ = 311011323367 is a prime.

It is a super-2 number, since 2×311011323431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311011323397 and 311011323406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311011323439) 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, 914750 + ... + 1207803.

It is an arithmetic number, because the mean of its divisors is an integer number (77753398128).

Almost surely, 2^311011323431 is an apocalyptic number.

311011323431 is a deficient number, since it is larger than the sum of its proper divisors (2269081).

311011323431 is a wasteful number, since it uses less digits than its factorization.

311011323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269080.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 311011323431 its reverse (134323110113), we get a palindrome (445334433544).

The spelling of 311011323431 in words is "three hundred eleven billion, eleven million, three hundred twenty-three thousand, four hundred thirty-one".