311019985 has 8 divisors (see below), whose sum is σ = 375696576. Its totient is φ = 247167600.

The previous prime is 311019977. The next prime is 311020013. The reversal of 311019985 is 589910113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 311019985 - 2³ = 311019977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205219 + ... + 206728.

It is an arithmetic number, because the mean of its divisors is an integer number (46962072).

Almost surely, 2^311019985 is an apocalyptic number.

It is an amenable number.

311019985 is a deficient number, since it is larger than the sum of its proper divisors (64676591).

311019985 is a wasteful number, since it uses less digits than its factorization.

311019985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412103.

The product of its (nonzero) digits is 9720, while the sum is 37.

The square root of 311019985 is about 17635.7587021370. The cubic root of 311019985 is about 677.5314074300.

The spelling of 311019985 in words is "three hundred eleven million, nineteen thousand, nine hundred eighty-five".