208145563 has 16 divisors (see below), whose sum is σ = 220594176. Its totient is φ = 196103520.

The previous prime is 208145549. The next prime is 208145573. The reversal of 208145563 is 365541802.

It is not a de Polignac number, because 208145563 - 2⁹ = 208145051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208145543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 543270 + ... + 543652.

It is an arithmetic number, because the mean of its divisors is an integer number (13787136).

Almost surely, 2^208145563 is an apocalyptic number.

208145563 is a deficient number, since it is larger than the sum of its proper divisors (12448613).

208145563 is a wasteful number, since it uses less digits than its factorization.

208145563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 208145563 is about 14427.2507082950. The cubic root of 208145563 is about 592.6373961365.

The spelling of 208145563 in words is "two hundred eight million, one hundred forty-five thousand, five hundred sixty-three".