520245563 has 4 divisors (see below), whose sum is σ = 520907400. Its totient is φ = 519583728.

The previous prime is 520245547. The next prime is 520245571. The reversal of 520245563 is 365542025.

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 520245563 - 2⁴ = 520245547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520245163) 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, 329738 + ... + 331311.

It is an arithmetic number, because the mean of its divisors is an integer number (130226850).

Almost surely, 2^520245563 is an apocalyptic number.

520245563 is a deficient number, since it is larger than the sum of its proper divisors (661837).

520245563 is an equidigital number, since it uses as much as digits as its factorization.

520245563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661836.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 520245563 is about 22808.8921914239. The cubic root of 520245563 is about 804.2717140384.

Adding to 520245563 its reverse (365542025), we get a palindrome (885787588).

The spelling of 520245563 in words is "five hundred twenty million, two hundred forty-five thousand, five hundred sixty-three".