320042311 has 2 divisors, whose sum is σ = 320042312. Its totient is φ = 320042310.

The previous prime is 320042297. The next prime is 320042339. The reversal of 320042311 is 113240023.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320042311 - 2²⁵ = 286487879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320042011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160021155 + 160021156.

It is an arithmetic number, because the mean of its divisors is an integer number (160021156).

Almost surely, 2^320042311 is an apocalyptic number.

320042311 is a deficient number, since it is larger than the sum of its proper divisors (1).

320042311 is an equidigital number, since it uses as much as digits as its factorization.

320042311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320042311 is about 17889.7264093110. The cubic root of 320042311 is about 684.0205235056.

Adding to 320042311 its reverse (113240023), we get a palindrome (433282334).

The spelling of 320042311 in words is "three hundred twenty million, forty-two thousand, three hundred eleven".