505533503 has 4 divisors (see below), whose sum is σ = 505578528. Its totient is φ = 505488480.

The previous prime is 505533493. The next prime is 505533521. The reversal of 505533503 is 305335505.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 505533503 - 2⁴ = 505533487 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 (505533593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9575 + ... + 33207.

It is an arithmetic number, because the mean of its divisors is an integer number (126394632).

Almost surely, 2^505533503 is an apocalyptic number.

505533503 is a deficient number, since it is larger than the sum of its proper divisors (45025).

505533503 is a wasteful number, since it uses less digits than its factorization.

505533503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45024.

The product of its (nonzero) digits is 16875, while the sum is 29.

The square root of 505533503 is about 22484.0722067867. The cubic root of 505533503 is about 796.6177534749.

The spelling of 505533503 in words is "five hundred five million, five hundred thirty-three thousand, five hundred three".