563561 has 2 divisors, whose sum is σ = 563562. Its totient is φ = 563560.

The previous prime is 563551. The next prime is 563587. The reversal of 563561 is 165365.

It is an a-pointer prime, because the next prime (563587) can be obtained adding 563561 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430336 + 133225 = 656^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 563561 - 2¹⁰ = 562537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 563561.

It is not a weakly prime, because it can be changed into another prime (563501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281780 + 281781.

It is an arithmetic number, because the mean of its divisors is an integer number (281781).

2⁵⁶³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

563561 is a deficient number, since it is larger than the sum of its proper divisors (1).

563561 is an equidigital number, since it uses as much as digits as its factorization.

563561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 26.

The square root of 563561 is about 750.7070001006. The cubic root of 563561 is about 82.6000500286.

The spelling of 563561 in words is "five hundred sixty-three thousand, five hundred sixty-one".