2006563 has 4 divisors (see below), whose sum is σ = 2160928. Its totient is φ = 1852200.

The previous prime is 2006549. The next prime is 2006573. The reversal of 2006563 is 3656002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2006563 - 2¹³ = 1998371 is a prime.

It is a Duffinian number.

2006563 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2006503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77163 + ... + 77188.

It is an arithmetic number, because the mean of its divisors is an integer number (540232).

2^2006563 is an apocalyptic number.

2006563 is a deficient number, since it is larger than the sum of its proper divisors (154365).

2006563 is a wasteful number, since it uses less digits than its factorization.

2006563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154364.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 2006563 is about 1416.5320328182. The cubic root of 2006563 is about 126.1297688819.

The spelling of 2006563 in words is "two million, six thousand, five hundred sixty-three".