320111311 has 4 divisors (see below), whose sum is σ = 344735272. Its totient is φ = 295487352.

The previous prime is 320111293. The next prime is 320111333. The reversal of 320111311 is 113111023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320111311 - 2⁵ = 320111279 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 24623947 = 320111311 / (3 + 2 + 0 + 1 + 1 + 1 + 3 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320111291 and 320111300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320171311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12311961 + ... + 12311986.

It is an arithmetic number, because the mean of its divisors is an integer number (86183818).

Almost surely, 2^320111311 is an apocalyptic number.

320111311 is a deficient number, since it is larger than the sum of its proper divisors (24623961).

320111311 is a wasteful number, since it uses less digits than its factorization.

320111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24623960.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 320111311 is about 17891.6547865199. The cubic root of 320111311 is about 684.0696774487.

Adding to 320111311 its reverse (113111023), we get a palindrome (433222334).

The spelling of 320111311 in words is "three hundred twenty million, one hundred eleven thousand, three hundred eleven".