320520583 has 4 divisors (see below), whose sum is σ = 320556600. Its totient is φ = 320484568.

The previous prime is 320520559. The next prime is 320520593. The reversal of 320520583 is 385025023.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 320520583 - 2²⁵ = 286966151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320520593) 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, 6093 + ... + 26041.

It is an arithmetic number, because the mean of its divisors is an integer number (80139150).

Almost surely, 2^320520583 is an apocalyptic number.

320520583 is a deficient number, since it is larger than the sum of its proper divisors (36017).

320520583 is a wasteful number, since it uses less digits than its factorization.

320520583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36016.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 320520583 is about 17903.0886441418. The cubic root of 320520583 is about 684.3610878874.

The spelling of 320520583 in words is "three hundred twenty million, five hundred twenty thousand, five hundred eighty-three".