503313021 has 24 divisors (see below), whose sum is σ = 793621920. Its totient is φ = 317878992.

The previous prime is 503313001. The next prime is 503313053. The reversal of 503313021 is 120313305.

It is not a de Polignac number, because 503313021 - 2¹⁷ = 503181949 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 503312985 and 503313003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503313001) 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 23 ways as a sum of consecutive naturals, for example, 49890 + ... + 59123.

It is an arithmetic number, because the mean of its divisors is an integer number (33067580).

Almost surely, 2^503313021 is an apocalyptic number.

It is an amenable number.

503313021 is a deficient number, since it is larger than the sum of its proper divisors (290308899).

503313021 is a wasteful number, since it uses less digits than its factorization.

503313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109047 (or 109035 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 503313021 is about 22434.6388649338. The cubic root of 503313021 is about 795.4496992955.

Adding to 503313021 its reverse (120313305), we get a palindrome (623626326).

The spelling of 503313021 in words is "five hundred three million, three hundred thirteen thousand, twenty-one".