563635081 has 3 divisors (see below), whose sum is σ = 563658823. Its totient is φ = 563611340.

The previous prime is 563635069. The next prime is 563635109. The reversal of 563635081 is 180536365.

The square root of 563635081 is 23741.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 180536365 = 5 ⋅36107273.

It can be written as a sum of positive squares in only one way, i.e., 561263481 + 2371600 = 23691^2 + 1540^2 .

It is not a de Polignac number, because 563635081 - 2⁵ = 563635049 is a prime.

It is a super-2 number, since 2×563635081² = 635369009067753122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 563635081.

It is not an unprimeable number, because it can be changed into a prime (563635031) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11871 + ... + 35611.

Almost surely, 2^563635081 is an apocalyptic number.

563635081 is the 23741-st square number.

563635081 is the 11871-st centered octagonal number.

It is an amenable number.

563635081 is a deficient number, since it is larger than the sum of its proper divisors (23742).

563635081 is an frugal number, since it uses more digits than its factorization.

563635081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47482 (or 23741 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The cubic root of 563635081 is about 826.0366917317.

The spelling of 563635081 in words is "five hundred sixty-three million, six hundred thirty-five thousand, eighty-one".