311912 has 16 divisors (see below), whose sum is σ = 591360. Its totient is φ = 154224.

The previous prime is 311897. The next prime is 311951. The reversal of 311912 is 219113.

It is a happy number.

It is an unprimeable number.

311912 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 863 + ... + 1169.

It is an arithmetic number, because the mean of its divisors is an integer number (36960).

2³¹¹⁹¹² is an apocalyptic number.

It is an amenable number.

311912 is a deficient number, since it is larger than the sum of its proper divisors (279448).

311912 is a wasteful number, since it uses less digits than its factorization.

311912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440 (or 436 counting only the distinct ones).

The product of its digits is 54, while the sum is 17.

The square root of 311912 is about 558.4908235593. The cubic root of 311912 is about 67.8178516238.

The spelling of 311912 in words is "three hundred eleven thousand, nine hundred twelve".