320243311 has 2 divisors, whose sum is σ = 320243312. Its totient is φ = 320243310.

The previous prime is 320243293. The next prime is 320243369. The reversal of 320243311 is 113342023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320243311 - 2⁹ = 320242799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320243381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160121655 + 160121656.

It is an arithmetic number, because the mean of its divisors is an integer number (160121656).

Almost surely, 2^320243311 is an apocalyptic number.

320243311 is a deficient number, since it is larger than the sum of its proper divisors (1).

320243311 is an equidigital number, since it uses as much as digits as its factorization.

320243311 is an odious number, because the sum of its binary digits is odd.

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

The square root of 320243311 is about 17895.3432769534. The cubic root of 320243311 is about 684.1636914012.

Adding to 320243311 its reverse (113342023), we get a palindrome (433585334).

The spelling of 320243311 in words is "three hundred twenty million, two hundred forty-three thousand, three hundred eleven".