311332313 has 6 divisors (see below), whose sum is σ = 322438974. Its totient is φ = 300595904.

The previous prime is 311332303. The next prime is 311332327. The reversal of 311332313 is 313233113.

It can be written as a sum of positive squares in 3 ways, for example, as 151486864 + 159845449 = 12308^2 + 12643^2 .

It is not a de Polignac number, because 311332313 - 2⁴ = 311332297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311332303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184256 + ... + 185937.

It is an arithmetic number, because the mean of its divisors is an integer number (53739829).

Almost surely, 2^311332313 is an apocalyptic number.

It is an amenable number.

311332313 is a deficient number, since it is larger than the sum of its proper divisors (11106661).

311332313 is an equidigital number, since it uses as much as digits as its factorization.

311332313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370251 (or 370222 counting only the distinct ones).

The product of its digits is 486, while the sum is 20.

The square root of 311332313 is about 17644.6114437241. The cubic root of 311332313 is about 677.7581251600.

Adding to 311332313 its reverse (313233113), we get a palindrome (624565426).

The spelling of 311332313 in words is "three hundred eleven million, three hundred thirty-two thousand, three hundred thirteen".