311431330423 has 4 divisors (see below), whose sum is σ = 312413763960. Its totient is φ = 310448896888.

The previous prime is 311431330409. The next prime is 311431330433. The reversal of 311431330423 is 324033134113.

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-311431330423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311431330391 and 311431330400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311431330433) 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, 491216293 + ... + 491216926.

It is an arithmetic number, because the mean of its divisors is an integer number (78103440990).

Almost surely, 2^311431330423 is an apocalyptic number.

311431330423 is a deficient number, since it is larger than the sum of its proper divisors (982433537).

311431330423 is an equidigital number, since it uses as much as digits as its factorization.

311431330423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982433536.

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

Adding to 311431330423 its reverse (324033134113), we get a palindrome (635464464536).

The spelling of 311431330423 in words is "three hundred eleven billion, four hundred thirty-one million, three hundred thirty thousand, four hundred twenty-three".