320310145 has 4 divisors (see below), whose sum is σ = 384372180. Its totient is φ = 256248112.

The previous prime is 320310143. The next prime is 320310157. The reversal of 320310145 is 541013023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75325041 + 244985104 = 8679^2 + 15652^2 .

It is a cyclic number.

It is not a de Polignac number, because 320310145 - 2¹ = 320310143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320310143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32031010 + ... + 32031019.

It is an arithmetic number, because the mean of its divisors is an integer number (96093045).

Almost surely, 2^320310145 is an apocalyptic number.

It is an amenable number.

320310145 is a deficient number, since it is larger than the sum of its proper divisors (64062035).

320310145 is an equidigital number, since it uses as much as digits as its factorization.

320310145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64062034.

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

The square root of 320310145 is about 17897.2105368407. The cubic root of 320310145 is about 684.2112825233.

Adding to 320310145 its reverse (541013023), we get a palindrome (861323168).

The spelling of 320310145 in words is "three hundred twenty million, three hundred ten thousand, one hundred forty-five".