320500545 has 16 divisors (see below), whose sum is σ = 513181440. Its totient is φ = 170806784.

The previous prime is 320500471. The next prime is 320500553. The reversal of 320500545 is 545005023.

It is a cyclic number.

It is not a de Polignac number, because 320500545 - 2¹⁴ = 320484161 is a prime.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 15121 + ... + 29489.

It is an arithmetic number, because the mean of its divisors is an integer number (32073840).

Almost surely, 2^320500545 is an apocalyptic number.

It is an amenable number.

320500545 is a deficient number, since it is larger than the sum of its proper divisors (192680895).

320500545 is a wasteful number, since it uses less digits than its factorization.

320500545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15864.

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 320500545 is about 17902.5290112878. The cubic root of 320500545 is about 684.3468261791.

Adding to 320500545 its reverse (545005023), we get a palindrome (865505568).

The spelling of 320500545 in words is "three hundred twenty million, five hundred thousand, five hundred forty-five".