311331100312 has 32 divisors (see below), whose sum is σ = 629745775200. Its totient is φ = 143744433664.

The previous prime is 311331100291. The next prime is 311331100319. The reversal of 311331100312 is 213001133113.

It is a self number, because there is not a number n which added to its sum of digits gives 311331100312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311331100319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21589012 + ... + 21603427.

It is an arithmetic number, because the mean of its divisors is an integer number (19679555475).

Almost surely, 2^311331100312 is an apocalyptic number.

It is an amenable number.

311331100312 is an abundant number, since it is smaller than the sum of its proper divisors (318414674888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311331100312 is a wasteful number, since it uses less digits than its factorization.

311331100312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43192515 (or 43192511 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 311331100312 its reverse (213001133113), we get a palindrome (524332233425).

The spelling of 311331100312 in words is "three hundred eleven billion, three hundred thirty-one million, one hundred thousand, three hundred twelve".