505521503 has 16 divisors (see below), whose sum is σ = 540929664. Its totient is φ = 470776320.

The previous prime is 505521493. The next prime is 505521521. The reversal of 505521503 is 305125505.

It is a cyclic number.

It is not a de Polignac number, because 505521503 - 2⁴ = 505521487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505521593) 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, 907301 + ... + 907857.

It is an arithmetic number, because the mean of its divisors is an integer number (33808104).

Almost surely, 2^505521503 is an apocalyptic number.

505521503 is a deficient number, since it is larger than the sum of its proper divisors (35408161).

505521503 is a wasteful number, since it uses less digits than its factorization.

505521503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042.

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 505521503 is about 22483.8053496289. The cubic root of 505521503 is about 796.6114502404.

The spelling of 505521503 in words is "five hundred five million, five hundred twenty-one thousand, five hundred three".