206563 has 8 divisors (see below), whose sum is σ = 246528. Its totient is φ = 169224.

The previous prime is 206551. The next prime is 206593. The reversal of 206563 is 365602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206563 - 2⁹ = 206051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481 + ... + 802.

It is an arithmetic number, because the mean of its divisors is an integer number (30816).

2²⁰⁶⁵⁶³ is an apocalyptic number.

206563 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

206563 is a deficient number, since it is larger than the sum of its proper divisors (39965).

206563 is a wasteful number, since it uses less digits than its factorization.

206563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313.

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

The square root of 206563 is about 454.4920241324. The cubic root of 206563 is about 59.1131602054.

The spelling of 206563 in words is "two hundred six thousand, five hundred sixty-three".