311319 has 6 divisors (see below), whose sum is σ = 449696. Its totient is φ = 207540.

The previous prime is 311303. The next prime is 311323. The reversal of 311319 is 913113.

It is not a de Polignac number, because 311319 - 2⁴ = 311303 is a prime.

It is a super-2 number, since 2×311319² = 193839039522, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17287 + ... + 17304.

2³¹¹³¹⁹ is an apocalyptic number.

311319 is a deficient number, since it is larger than the sum of its proper divisors (138377).

311319 is a wasteful number, since it uses less digits than its factorization.

311319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34597 (or 34594 counting only the distinct ones).

The product of its digits is 81, while the sum is 18.

The square root of 311319 is about 557.9596759623. The cubic root of 311319 is about 67.7748464398.

It can be divided in two parts, 311 and 319, that added together give a triangular number (630 = T₃₅).

The spelling of 311319 in words is "three hundred eleven thousand, three hundred nineteen".