320420313 has 16 divisors (see below), whose sum is σ = 499681600. Its totient is φ = 202370400.

The previous prime is 320420299. The next prime is 320420341. The reversal of 320420313 is 313024023.

It is not a de Polignac number, because 320420313 - 2⁴ = 320420297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320420363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311788 + ... + 312813.

It is an arithmetic number, because the mean of its divisors is an integer number (31230100).

Almost surely, 2^320420313 is an apocalyptic number.

It is an amenable number.

320420313 is a deficient number, since it is larger than the sum of its proper divisors (179261287).

320420313 is a wasteful number, since it uses less digits than its factorization.

320420313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624629 (or 624623 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 320420313 is about 17900.2880703077. The cubic root of 320420313 is about 684.2897164511.

Adding to 320420313 its reverse (313024023), we get a palindrome (633444336).

The spelling of 320420313 in words is "three hundred twenty million, four hundred twenty thousand, three hundred thirteen".