520563 has 8 divisors (see below), whose sum is σ = 703888. Its totient is φ = 342144.

The previous prime is 520549. The next prime is 520567. The reversal of 520563 is 365025.

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

It is not a de Polignac number, because 520563 - 2⁴ = 520547 is a prime.

It is the 722-nd Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520567) by changing a digit.

It is a nontrivial repunit in base 721.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (87986).

2⁵²⁰⁵⁶³ is an apocalyptic number.

520563 is a deficient number, since it is larger than the sum of its proper divisors (183325).

520563 is a wasteful number, since it uses less digits than its factorization.

520563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2453.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 520563 is about 721.5005197503. The cubic root of 520563 is about 80.4435260967.

Adding to 520563 its reverse (365025), we get a palindrome (885588).

The spelling of 520563 in words is "five hundred twenty thousand, five hundred sixty-three".