206161565 has 16 divisors (see below), whose sum is σ = 253754688. Its totient is φ = 160707456.

The previous prime is 206161547. The next prime is 206161577. The reversal of 206161565 is 565161602.

206161565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 206161565 - 2²⁰ = 205112989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116729 + ... + 118481.

It is an arithmetic number, because the mean of its divisors is an integer number (15859668).

Almost surely, 2^206161565 is an apocalyptic number.

It is an amenable number.

206161565 is a deficient number, since it is larger than the sum of its proper divisors (47593123).

206161565 is a wasteful number, since it uses less digits than its factorization.

206161565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 206161565 is about 14358.3273747328. The cubic root of 206161565 is about 590.7484182237.

The spelling of 206161565 in words is "two hundred six million, one hundred sixty-one thousand, five hundred sixty-five".