505731715 has 4 divisors (see below), whose sum is σ = 606878064. Its totient is φ = 404585368.

The previous prime is 505731701. The next prime is 505731719. The reversal of 505731715 is 517137505.

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

It is a cyclic number.

It is not a de Polignac number, because 505731715 - 2¹³ = 505723523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505731719) 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, 50573167 + ... + 50573176.

It is an arithmetic number, because the mean of its divisors is an integer number (151719516).

Almost surely, 2^505731715 is an apocalyptic number.

505731715 is a deficient number, since it is larger than the sum of its proper divisors (101146349).

505731715 is a wasteful number, since it uses less digits than its factorization.

505731715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101146348.

The product of its (nonzero) digits is 18375, while the sum is 34.

The square root of 505731715 is about 22488.4796062339. The cubic root of 505731715 is about 796.7218537736.

The spelling of 505731715 in words is "five hundred five million, seven hundred thirty-one thousand, seven hundred fifteen".