520505617 has 8 divisors (see below), whose sum is σ = 543456000. Its totient is φ = 497581920.

The previous prime is 520505581. The next prime is 520505651. The reversal of 520505617 is 716505025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520505617 - 2²³ = 512117009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520505017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40317 + ... + 51637.

It is an arithmetic number, because the mean of its divisors is an integer number (67932000).

Almost surely, 2^520505617 is an apocalyptic number.

It is an amenable number.

520505617 is a deficient number, since it is larger than the sum of its proper divisors (22950383).

520505617 is a wasteful number, since it uses less digits than its factorization.

520505617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13343.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 520505617 is about 22814.5921944706. The cubic root of 520505617 is about 804.4057015570.

The spelling of 520505617 in words is "five hundred twenty million, five hundred five thousand, six hundred seventeen".