505015643 has 6 divisors (see below), whose sum is σ = 555099972. Its totient is φ = 459105020.

The previous prime is 505015631. The next prime is 505015661. The reversal of 505015643 is 346510505.

It is not a de Polignac number, because 505015643 - 2⁶ = 505015579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505015663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2086721 + ... + 2086962.

It is an arithmetic number, because the mean of its divisors is an integer number (92516662).

Almost surely, 2^505015643 is an apocalyptic number.

505015643 is a deficient number, since it is larger than the sum of its proper divisors (50084329).

505015643 is a wasteful number, since it uses less digits than its factorization.

505015643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4173705 (or 4173694 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 505015643 is about 22472.5531037308. The cubic root of 505015643 is about 796.3456466065.

The spelling of 505015643 in words is "five hundred five million, fifteen thousand, six hundred forty-three".