2564563 has 12 divisors (see below), whose sum is σ = 2801640. Its totient is φ = 2340576.

The previous prime is 2564561. The next prime is 2564567. The reversal of 2564563 is 3654652.

2564563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2564563 - 2¹ = 2564561 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 6³ + 4⁵ + 5⁹ + 6⁵ + 3² .

It is a Duffinian number.

Its product of digits (21600) is a multiple of the sum of its prime divisors (135).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564561) 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 in 11 ways as a sum of consecutive naturals, for example, 35095 + ... + 35167.

It is an arithmetic number, because the mean of its divisors is an integer number (233470).

2^2564563 is an apocalyptic number.

2564563 is a deficient number, since it is larger than the sum of its proper divisors (237077).

2564563 is an equidigital number, since it uses as much as digits as its factorization.

2564563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 135 counting only the distinct ones).

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

The square root of 2564563 is about 1601.4253026601. The cubic root of 2564563 is about 136.8793047860.

The spelling of 2564563 in words is "two million, five hundred sixty-four thousand, five hundred sixty-three".