206563345 has 64 divisors (see below), whose sum is σ = 296110080. Its totient is φ = 137161728.

The previous prime is 206563337. The next prime is 206563349. The reversal of 206563345 is 543365602.

It is a cyclic number.

It is not a de Polignac number, because 206563345 - 2³ = 206563337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206563345.

It is not an unprimeable number, because it can be changed into a prime (206563349) 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 in 63 ways as a sum of consecutive naturals, for example, 2488674 + ... + 2488756.

It is an arithmetic number, because the mean of its divisors is an integer number (4626720).

Almost surely, 2^206563345 is an apocalyptic number.

It is an amenable number.

206563345 is a deficient number, since it is larger than the sum of its proper divisors (89546735).

206563345 is a wasteful number, since it uses less digits than its factorization.

206563345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214.

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 206563345 is about 14372.3117486367. The cubic root of 206563345 is about 591.1319311549.

The spelling of 206563345 in words is "two hundred six million, five hundred sixty-three thousand, three hundred forty-five".