311405313 has 8 divisors (see below), whose sum is σ = 415318176. Its totient is φ = 207548000.

The previous prime is 311405309. The next prime is 311405327. The reversal of 311405313 is 313504113.

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 311405313 - 2² = 311405309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311405313.

It is not an unprimeable number, because it can be changed into a prime (311405713) by changing a digit.

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, 1693 + ... + 25013.

It is an arithmetic number, because the mean of its divisors is an integer number (51914772).

Almost surely, 2^311405313 is an apocalyptic number.

It is an amenable number.

311405313 is a deficient number, since it is larger than the sum of its proper divisors (103912863).

311405313 is a wasteful number, since it uses less digits than its factorization.

311405313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27775.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 311405313 is about 17646.6799426974. The cubic root of 311405313 is about 677.8110937240.

Adding to 311405313 its reverse (313504113), we get a palindrome (624909426).

The spelling of 311405313 in words is "three hundred eleven million, four hundred five thousand, three hundred thirteen".