320243111 has 2 divisors, whose sum is σ = 320243112. Its totient is φ = 320243110.

The previous prime is 320243069. The next prime is 320243123. The reversal of 320243111 is 111342023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320243111 - 2²² = 316048807 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320243111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320243141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160121555 + 160121556.

It is an arithmetic number, because the mean of its divisors is an integer number (160121556).

Almost surely, 2^320243111 is an apocalyptic number.

320243111 is a deficient number, since it is larger than the sum of its proper divisors (1).

320243111 is an equidigital number, since it uses as much as digits as its factorization.

320243111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 320243111 is about 17895.3376889066. The cubic root of 320243111 is about 684.1635489753.

Adding to 320243111 its reverse (111342023), we get a palindrome (431585134).

The spelling of 320243111 in words is "three hundred twenty million, two hundred forty-three thousand, one hundred eleven".