505265913 has 6 divisors (see below), whose sum is σ = 729828554. Its totient is φ = 336843936.

The previous prime is 505265897. The next prime is 505265939. The reversal of 505265913 is 319562505.

505265913 is a `hidden beast` number, since 505 + 2 + 65 + 91 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 480135744 + 25130169 = 21912^2 + 5013^2 .

It is not a de Polignac number, because 505265913 - 2⁴ = 505265897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505265413) 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, 28070320 + ... + 28070337.

Almost surely, 2^505265913 is an apocalyptic number.

It is an amenable number.

505265913 is a deficient number, since it is larger than the sum of its proper divisors (224562641).

505265913 is a wasteful number, since it uses less digits than its factorization.

505265913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56140663 (or 56140660 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 505265913 is about 22478.1207621990. The cubic root of 505265913 is about 796.4771729029.

The spelling of 505265913 in words is "five hundred five million, two hundred sixty-five thousand, nine hundred thirteen".