311302313 has 4 divisors (see below), whose sum is σ = 355774080. Its totient is φ = 266830548.

The previous prime is 311302261. The next prime is 311302339. The reversal of 311302313 is 313203113.

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-311302313 is a prime.

It is a super-3 number, since 3×311302313³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311302291 and 311302300.

It is not an unprimeable number, because it can be changed into a prime (311302393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22235873 + ... + 22235886.

It is an arithmetic number, because the mean of its divisors is an integer number (88943520).

Almost surely, 2^311302313 is an apocalyptic number.

It is an amenable number.

311302313 is a deficient number, since it is larger than the sum of its proper divisors (44471767).

311302313 is an equidigital number, since it uses as much as digits as its factorization.

311302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44471766.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 311302313 is about 17643.7613053453. The cubic root of 311302313 is about 677.7363548565.

Adding to 311302313 its reverse (313203113), we get a palindrome (624505426).

The spelling of 311302313 in words is "three hundred eleven million, three hundred two thousand, three hundred thirteen".