501563 has 2 divisors, whose sum is σ = 501564. Its totient is φ = 501562.

The previous prime is 501511. The next prime is 501577. The reversal of 501563 is 365105.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 501563 - 2¹⁶ = 436027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (501503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250781 + 250782.

It is an arithmetic number, because the mean of its divisors is an integer number (250782).

2⁵⁰¹⁵⁶³ is an apocalyptic number.

501563 is a deficient number, since it is larger than the sum of its proper divisors (1).

501563 is an equidigital number, since it uses as much as digits as its factorization.

501563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 501563 is about 708.2111267129. The cubic root of 501563 is about 79.4526701654.

Adding to 501563 its reverse (365105), we get a palindrome (866668).

The spelling of 501563 in words is "five hundred one thousand, five hundred sixty-three".