1003520531503 has 48 divisors (see below), whose sum is σ = 1207257592320. Its totient is φ = 831272769600.

The previous prime is 1003520531441. The next prime is 1003520531579. The reversal of 1003520531503 is 3051350253001.

It is a de Polignac number, because none of the positive numbers 2^k-1003520531503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003520531303) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 287457588 + ... + 287461078.

It is an arithmetic number, because the mean of its divisors is an integer number (25151199840).

Almost surely, 2^{1003520531503} is an apocalyptic number.

1003520531503 is a deficient number, since it is larger than the sum of its proper divisors (203737060817).

1003520531503 is a wasteful number, since it uses less digits than its factorization.

1003520531503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 28.

Adding to 1003520531503 its reverse (3051350253001), we get a palindrome (4054870784504).

The spelling of 1003520531503 in words is "one trillion, three billion, five hundred twenty million, five hundred thirty-one thousand, five hundred three".