320310161 has 4 divisors (see below), whose sum is σ = 324364800. Its totient is φ = 316255524.

The previous prime is 320310157. The next prime is 320310169. The reversal of 320310161 is 161013023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 161013023 = 47 ⋅3425809.

It is a cyclic number.

It is not a de Polignac number, because 320310161 - 2² = 320310157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320310169) 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, 2027201 + ... + 2027358.

It is an arithmetic number, because the mean of its divisors is an integer number (81091200).

Almost surely, 2^320310161 is an apocalyptic number.

It is an amenable number.

320310161 is a deficient number, since it is larger than the sum of its proper divisors (4054639).

320310161 is an equidigital number, since it uses as much as digits as its factorization.

320310161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054638.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 320310161 is about 17897.2109838377. The cubic root of 320310161 is about 684.2112939158.

Adding to 320310161 its reverse (161013023), we get a palindrome (481323184).

The spelling of 320310161 in words is "three hundred twenty million, three hundred ten thousand, one hundred sixty-one".