563663521 has 12 divisors (see below), whose sum is σ = 578415600. Its totient is φ = 549126600.

The previous prime is 563663489. The next prime is 563663539. The reversal of 563663521 is 125366365.

It is not a de Polignac number, because 563663521 - 2⁵ = 563663489 is a prime.

It is a super-2 number, since 2×563663521² = 635433129812234882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563663591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1345050 + ... + 1345468.

It is an arithmetic number, because the mean of its divisors is an integer number (48201300).

Almost surely, 2^563663521 is an apocalyptic number.

It is an amenable number.

563663521 is a deficient number, since it is larger than the sum of its proper divisors (14752079).

563663521 is an equidigital number, since it uses as much as digits as its factorization.

563663521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 629 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 563663521 is about 23741.5989562624. The cubic root of 563663521 is about 826.0505849339.

The spelling of 563663521 in words is "five hundred sixty-three million, six hundred sixty-three thousand, five hundred twenty-one".