311431030432231 has 2 divisors, whose sum is σ = 311431030432232. Its totient is φ = 311431030432230.

The previous prime is 311431030432147. The next prime is 311431030432349. The reversal of 311431030432231 is 132234030134113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311431030432231 - 2³⁵ = 311396670693863 is a prime.

It is a super-2 number, since 2×311431030432231² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311431030432193 and 311431030432202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311431039432231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155715515216115 + 155715515216116.

It is an arithmetic number, because the mean of its divisors is an integer number (155715515216116).

Almost surely, 2^{311431030432231} is an apocalyptic number.

311431030432231 is a deficient number, since it is larger than the sum of its proper divisors (1).

311431030432231 is an equidigital number, since it uses as much as digits as its factorization.

311431030432231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 311431030432231 its reverse (132234030134113), we get a palindrome (443665060566344).

The spelling of 311431030432231 in words is "three hundred eleven trillion, four hundred thirty-one billion, thirty million, four hundred thirty-two thousand, two hundred thirty-one".