311340313 has 4 divisors (see below), whose sum is σ = 311392768. Its totient is φ = 311287860.

The previous prime is 311340307. The next prime is 311340319. The reversal of 311340313 is 313043113.

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, and also an emirpimes, since its reverse is a distinct semiprime: 313043113 = 487 ⋅642799.

It is an interprime number because it is at equal distance from previous prime (311340307) and next prime (311340319).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311340313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311340319) 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, 15993 + ... + 29638.

It is an arithmetic number, because the mean of its divisors is an integer number (77848192).

Almost surely, 2^311340313 is an apocalyptic number.

It is an amenable number.

311340313 is a deficient number, since it is larger than the sum of its proper divisors (52455).

311340313 is an equidigital number, since it uses as much as digits as its factorization.

311340313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52454.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 311340313 is about 17644.8381403741. The cubic root of 311340313 is about 677.7639303381.

Adding to 311340313 its reverse (313043113), we get a palindrome (624383426).

The spelling of 311340313 in words is "three hundred eleven million, three hundred forty thousand, three hundred thirteen".