320311445 has 8 divisors (see below), whose sum is σ = 388693080. Its totient is φ = 253369600.

The previous prime is 320311417. The next prime is 320311447. The reversal of 320311445 is 544113023.

It can be written as a sum of positive squares in 4 ways, for example, as 62837329 + 257474116 = 7927^2 + 16046^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320311445 - 2¹⁴ = 320295061 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320311445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320311447) 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 7 ways as a sum of consecutive naturals, for example, 359456 + ... + 360345.

It is an arithmetic number, because the mean of its divisors is an integer number (48586635).

Almost surely, 2^320311445 is an apocalyptic number.

It is an amenable number.

320311445 is a deficient number, since it is larger than the sum of its proper divisors (68381635).

320311445 is an equidigital number, since it uses as much as digits as its factorization.

320311445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719895.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 320311445 is about 17897.2468553127. The cubic root of 320311445 is about 684.2122081610.

Adding to 320311445 its reverse (544113023), we get a palindrome (864424468).

The spelling of 320311445 in words is "three hundred twenty million, three hundred eleven thousand, four hundred forty-five".