320915065 has 8 divisors (see below), whose sum is σ = 387551880. Its totient is φ = 255096192.

The previous prime is 320915041. The next prime is 320915071. The reversal of 320915065 is 560519023.

It can be written as a sum of positive squares in 4 ways, for example, as 5035536 + 315879529 = 2244^2 + 17773^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 320915065 - 2¹¹ = 320913017 is a prime.

It is an unprimeable number.

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, 203620 + ... + 205189.

It is an arithmetic number, because the mean of its divisors is an integer number (48443985).

Almost surely, 2^320915065 is an apocalyptic number.

It is an amenable number.

320915065 is a deficient number, since it is larger than the sum of its proper divisors (66636815).

320915065 is a wasteful number, since it uses less digits than its factorization.

320915065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408971.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 320915065 is about 17914.1024056468. The cubic root of 320915065 is about 684.6417328401.

The spelling of 320915065 in words is "three hundred twenty million, nine hundred fifteen thousand, sixty-five".