320540311 has 24 divisors (see below), whose sum is σ = 402702720. Its totient is φ = 252891072.

The previous prime is 320540309. The next prime is 320540323. The reversal of 320540311 is 113045023.

It is not a de Polignac number, because 320540311 - 2¹ = 320540309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320540371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386245 + ... + 387073.

It is an arithmetic number, because the mean of its divisors is an integer number (16779280).

Almost surely, 2^320540311 is an apocalyptic number.

320540311 is a deficient number, since it is larger than the sum of its proper divisors (82162409).

320540311 is a wasteful number, since it uses less digits than its factorization.

320540311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 320540311 is about 17903.6396020474. The cubic root of 320540311 is about 684.3751283779.

Adding to 320540311 its reverse (113045023), we get a palindrome (433585334).

The spelling of 320540311 in words is "three hundred twenty million, five hundred forty thousand, three hundred eleven".