520011003 has 4 divisors (see below), whose sum is σ = 693348008. Its totient is φ = 346674000.

The previous prime is 520010999. The next prime is 520011049. The reversal of 520011003 is 300110025.

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

It is not a de Polignac number, because 520011003 - 2² = 520010999 is a prime.

It is a super-2 number, since 2×520011003² = 540822886482132018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520011003.

It is not an unprimeable number, because it can be changed into a prime (520011103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86668498 + ... + 86668503.

It is an arithmetic number, because the mean of its divisors is an integer number (173337002).

Almost surely, 2^520011003 is an apocalyptic number.

520011003 is a deficient number, since it is larger than the sum of its proper divisors (173337005).

520011003 is a wasteful number, since it uses less digits than its factorization.

520011003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173337004.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 520011003 is about 22803.7497574412. The cubic root of 520011003 is about 804.1508234785.

Adding to 520011003 its reverse (300110025), we get a palindrome (820121028).

The spelling of 520011003 in words is "five hundred twenty million, eleven thousand, three".