320332313 has 4 divisors (see below), whose sum is σ = 366094080. Its totient is φ = 274570548.

The previous prime is 320332297. The next prime is 320332319. The reversal of 320332313 is 313233023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 320332313 - 2⁴ = 320332297 is a prime.

It is a super-2 number, since 2×320332313² = 205225581503859938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320332319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22880873 + ... + 22880886.

It is an arithmetic number, because the mean of its divisors is an integer number (91523520).

Almost surely, 2^320332313 is an apocalyptic number.

It is an amenable number.

320332313 is a deficient number, since it is larger than the sum of its proper divisors (45761767).

320332313 is an equidigital number, since it uses as much as digits as its factorization.

320332313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45761766.

The product of its (nonzero) digits is 972, while the sum is 20.

The square root of 320332313 is about 17897.8298405142. The cubic root of 320332313 is about 684.2270664399.

Adding to 320332313 its reverse (313233023), we get a palindrome (633565336).

The spelling of 320332313 in words is "three hundred twenty million, three hundred thirty-two thousand, three hundred thirteen".