563423521 has 2 divisors, whose sum is σ = 563423522. Its totient is φ = 563423520.

The previous prime is 563423519. The next prime is 563423527. The reversal of 563423521 is 125324365.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 441630225 + 121793296 = 21015^2 + 11036^2 .

It is a cyclic number.

It is not a de Polignac number, because 563423521 - 2¹ = 563423519 is a prime.

Together with 563423519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (563423527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281711760 + 281711761.

It is an arithmetic number, because the mean of its divisors is an integer number (281711761).

Almost surely, 2^563423521 is an apocalyptic number.

It is an amenable number.

563423521 is a deficient number, since it is larger than the sum of its proper divisors (1).

563423521 is an equidigital number, since it uses as much as digits as its factorization.

563423521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 31.

The square root of 563423521 is about 23736.5439986532. The cubic root of 563423521 is about 825.9333280497.

Adding to 563423521 its reverse (125324365), we get a palindrome (688747886).

The spelling of 563423521 in words is "five hundred sixty-three million, four hundred twenty-three thousand, five hundred twenty-one".