311443235212 has 12 divisors (see below), whose sum is σ = 545030100720. Its totient is φ = 155720349296.

The previous prime is 311443235209. The next prime is 311443235231. The reversal of 311443235212 is 212532344113.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432114 + ... + 899782.

It is an arithmetic number, because the mean of its divisors is an integer number (45419175060).

Almost surely, 2^311443235212 is an apocalyptic number.

It is an amenable number.

311443235212 is a deficient number, since it is larger than the sum of its proper divisors (233586865508).

311443235212 is a wasteful number, since it uses less digits than its factorization.

311443235212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634160 (or 634158 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

Adding to 311443235212 its reverse (212532344113), we get a palindrome (523975579325).

The spelling of 311443235212 in words is "three hundred eleven billion, four hundred forty-three million, two hundred thirty-five thousand, two hundred twelve".