311431011214243 has 4 divisors (see below), whose sum is σ = 311431250851840. Its totient is φ = 311430771576648.

The previous prime is 311431011214229. The next prime is 311431011214247. The reversal of 311431011214243 is 342412110134113.

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-311431011214243 is a prime.

It is a super-3 number, since 3×311431011214243³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311431011214247) 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, 117858723 + ... + 120472156.

It is an arithmetic number, because the mean of its divisors is an integer number (77857812712960).

Almost surely, 2^{311431011214243} is an apocalyptic number.

311431011214243 is a deficient number, since it is larger than the sum of its proper divisors (239637597).

311431011214243 is a wasteful number, since it uses less digits than its factorization.

311431011214243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239637596.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 311431011214243 its reverse (342412110134113), we get a palindrome (653843121348356).

The spelling of 311431011214243 in words is "three hundred eleven trillion, four hundred thirty-one billion, eleven million, two hundred fourteen thousand, two hundred forty-three".