311317 has 4 divisors (see below), whose sum is σ = 312480. Its totient is φ = 310156.

The previous prime is 311303. The next prime is 311323. The reversal of 311317 is 713113.

It is a happy number.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 713113 = 41 ⋅17393.

It is a cyclic number.

It is not a de Polignac number, because 311317 - 2⁷ = 311189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311347) 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, 48 + ... + 790.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

2³¹¹³¹⁷ is an apocalyptic number.

It is an amenable number.

311317 is a deficient number, since it is larger than the sum of its proper divisors (1163).

311317 is an equidigital number, since it uses as much as digits as its factorization.

311317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162.

The product of its digits is 63, while the sum is 16.

The square root of 311317 is about 557.9578837152. The cubic root of 311317 is about 67.7747013046.

The spelling of 311317 in words is "three hundred eleven thousand, three hundred seventeen", and thus it is an iban number.