503145520 has 40 divisors (see below), whose sum is σ = 1172670480. Its totient is φ = 200766720.

The previous prime is 503145509. The next prime is 503145529. The reversal of 503145520 is 25541305.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (503145529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26211 + ... + 41149.

It is an arithmetic number, because the mean of its divisors is an integer number (29316762).

Almost surely, 2^503145520 is an apocalyptic number.

It is an amenable number.

503145520 is an abundant number, since it is smaller than the sum of its proper divisors (669524960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

503145520 is a wasteful number, since it uses less digits than its factorization.

503145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15373 (or 15367 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 503145520 is about 22430.9054654510. The cubic root of 503145520 is about 795.3614484472.

Adding to 503145520 its reverse (25541305), we get a palindrome (528686825).

The spelling of 503145520 in words is "five hundred three million, one hundred forty-five thousand, five hundred twenty".