520331603 has 4 divisors (see below), whose sum is σ = 567634488. Its totient is φ = 473028720.

The previous prime is 520331593. The next prime is 520331611. The reversal of 520331603 is 306133025.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520331603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520331633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23651426 + ... + 23651447.

It is an arithmetic number, because the mean of its divisors is an integer number (141908622).

Almost surely, 2^520331603 is an apocalyptic number.

520331603 is a deficient number, since it is larger than the sum of its proper divisors (47302885).

520331603 is a wasteful number, since it uses less digits than its factorization.

520331603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47302884.

The product of its (nonzero) digits is 1620, while the sum is 23.

The square root of 520331603 is about 22810.7782199556. The cubic root of 520331603 is about 804.3160493349.

Adding to 520331603 its reverse (306133025), we get a palindrome (826464628).

The spelling of 520331603 in words is "five hundred twenty million, three hundred thirty-one thousand, six hundred three".