320342311 has 4 divisors (see below), whose sum is σ = 320378872. Its totient is φ = 320305752.

The previous prime is 320342249. The next prime is 320342327. The reversal of 320342311 is 113243023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 113243023 = 61 ⋅1856443.

It is a cyclic number.

It is not a de Polignac number, because 320342311 - 2²³ = 311953703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320342371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3565 + ... + 25561.

It is an arithmetic number, because the mean of its divisors is an integer number (80094718).

Almost surely, 2^320342311 is an apocalyptic number.

320342311 is a deficient number, since it is larger than the sum of its proper divisors (36561).

320342311 is a wasteful number, since it uses less digits than its factorization.

320342311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36560.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 320342311 is about 17898.1091459405. The cubic root of 320342311 is about 684.2341849132.

Adding to 320342311 its reverse (113243023), we get a palindrome (433585334).

The spelling of 320342311 in words is "three hundred twenty million, three hundred forty-two thousand, three hundred eleven".