311813975 has 18 divisors (see below), whose sum is σ = 424998840. Its totient is φ = 226771600.

The previous prime is 311813963. The next prime is 311813981. The reversal of 311813975 is 579318113.

It is not a de Polignac number, because 311813975 - 2¹⁶ = 311748439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 48515 + ... + 54564.

Almost surely, 2^311813975 is an apocalyptic number.

311813975 is a deficient number, since it is larger than the sum of its proper divisors (113184865).

311813975 is a wasteful number, since it uses less digits than its factorization.

311813975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103111 (or 103095 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 311813975 is about 17658.2551516281. The cubic root of 311813975 is about 678.1074647720.

The spelling of 311813975 in words is "three hundred eleven million, eight hundred thirteen thousand, nine hundred seventy-five".