520465565 has 12 divisors (see below), whose sum is σ = 636582324. Its totient is φ = 408505344.

The previous prime is 520465553. The next prime is 520465573. The reversal of 520465565 is 565564025.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 88698724 + 431766841 = 9418^2 + 20779^2 .

It is not a de Polignac number, because 520465565 - 2⁶ = 520465501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4484 + ... + 32573.

It is an arithmetic number, because the mean of its divisors is an integer number (53048527).

Almost surely, 2^520465565 is an apocalyptic number.

It is an amenable number.

520465565 is a deficient number, since it is larger than the sum of its proper divisors (116116759).

520465565 is an equidigital number, since it uses as much as digits as its factorization.

520465565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37168 (or 37115 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 520465565 is about 22813.7144060322. The cubic root of 520465565 is about 804.3850684889.

The spelling of 520465565 in words is "five hundred twenty million, four hundred sixty-five thousand, five hundred sixty-five".