505057503 has 4 divisors (see below), whose sum is σ = 673410008. Its totient is φ = 336705000.

The previous prime is 505057493. The next prime is 505057517. The reversal of 505057503 is 305750505.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 505057503 - 2¹⁷ = 504926431 is a prime.

It is a super-3 number, since 3×505057503³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505057103) 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, 84176248 + ... + 84176253.

It is an arithmetic number, because the mean of its divisors is an integer number (168352502).

Almost surely, 2^505057503 is an apocalyptic number.

505057503 is a deficient number, since it is larger than the sum of its proper divisors (168352505).

505057503 is a wasteful number, since it uses less digits than its factorization.

505057503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168352504.

The product of its (nonzero) digits is 13125, while the sum is 30.

The square root of 505057503 is about 22473.4844427828. The cubic root of 505057503 is about 796.3676486363.

The spelling of 505057503 in words is "five hundred five million, fifty-seven thousand, five hundred three".