311931313 has 8 divisors (see below), whose sum is σ = 326896128. Its totient is φ = 297083424.

The previous prime is 311931299. The next prime is 311931343. The reversal of 311931313 is 313139113.

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

It is a cyclic number.

It is not a de Polignac number, because 311931313 - 2⁵ = 311931281 is a prime.

It is a super-2 number, since 2×311931313² = 194602288059807938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311931343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23745 + ... + 34462.

It is an arithmetic number, because the mean of its divisors is an integer number (40862016).

Almost surely, 2^311931313 is an apocalyptic number.

It is an amenable number.

311931313 is a deficient number, since it is larger than the sum of its proper divisors (14964815).

311931313 is a wasteful number, since it uses less digits than its factorization.

311931313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58463.

The product of its digits is 729, while the sum is 25.

The square root of 311931313 is about 17661.5773078171. The cubic root of 311931313 is about 678.1925131251.

The spelling of 311931313 in words is "three hundred eleven million, nine hundred thirty-one thousand, three hundred thirteen".