503401503 has 40 divisors (see below), whose sum is σ = 753198640. Its totient is φ = 298995840.

The previous prime is 503401477. The next prime is 503401513. The reversal of 503401503 is 305104305.

It is not a de Polignac number, because 503401503 - 2⁵ = 503401471 is a prime.

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 503401503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (503401513) 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 39 ways as a sum of consecutive naturals, for example, 3206301 + ... + 3206457.

It is an arithmetic number, because the mean of its divisors is an integer number (18829966).

Almost surely, 2^503401503 is an apocalyptic number.

503401503 is a deficient number, since it is larger than the sum of its proper divisors (249797137).

503401503 is an equidigital number, since it uses as much as digits as its factorization.

503401503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 503401503 is about 22436.6107734658. The cubic root of 503401503 is about 795.4963096906.

Adding to 503401503 its reverse (305104305), we get a palindrome (808505808).

The spelling of 503401503 in words is "five hundred three million, four hundred one thousand, five hundred three".