503315403 has 16 divisors (see below), whose sum is σ = 697541376. Its totient is φ = 322535520.

The previous prime is 503315389. The next prime is 503315419. The reversal of 503315403 is 304513305.

It is a happy number.

It is not a de Polignac number, because 503315403 - 2⁸ = 503315147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (503305403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18103 + ... + 36528.

It is an arithmetic number, because the mean of its divisors is an integer number (43596336).

Almost surely, 2^503315403 is an apocalyptic number.

503315403 is a deficient number, since it is larger than the sum of its proper divisors (194225973).

503315403 is a wasteful number, since it uses less digits than its factorization.

503315403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54754.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 503315403 is about 22434.6919524205. The cubic root of 503315403 is about 795.4509541529.

Adding to 503315403 its reverse (304513305), we get a palindrome (807828708).

The spelling of 503315403 in words is "five hundred three million, three hundred fifteen thousand, four hundred three".