311211313 has 4 divisors (see below), whose sum is σ = 355670080. Its totient is φ = 266752548.

The previous prime is 311211301. The next prime is 311211349. The reversal of 311211313 is 313112113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311211313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311211113) 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 3 ways as a sum of consecutive naturals, for example, 22229373 + ... + 22229386.

It is an arithmetic number, because the mean of its divisors is an integer number (88917520).

Almost surely, 2^311211313 is an apocalyptic number.

It is an amenable number.

311211313 is a deficient number, since it is larger than the sum of its proper divisors (44458767).

311211313 is an equidigital number, since it uses as much as digits as its factorization.

311211313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44458766.

The product of its digits is 54, while the sum is 16.

The square root of 311211313 is about 17641.1823016486. The cubic root of 311211313 is about 677.6703097119.

Adding to 311211313 its reverse (313112113), we get a palindrome (624323426).

The spelling of 311211313 in words is "three hundred eleven million, two hundred eleven thousand, three hundred thirteen".