206100065 has 4 divisors (see below), whose sum is σ = 247320084. Its totient is φ = 164880048.

The previous prime is 206100047. The next prime is 206100113. The reversal of 206100065 is 560001602.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75203584 + 130896481 = 8672^2 + 11441^2 .

It is a cyclic number.

It is not a de Polignac number, because 206100065 - 2⁶ = 206100001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20610002 + ... + 20610011.

It is an arithmetic number, because the mean of its divisors is an integer number (61830021).

Almost surely, 2^206100065 is an apocalyptic number.

It is an amenable number.

206100065 is a deficient number, since it is larger than the sum of its proper divisors (41220019).

206100065 is an equidigital number, since it uses as much as digits as its factorization.

206100065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41220018.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 206100065 is about 14356.1856006392. The cubic root of 206100065 is about 590.6896703820.

Adding to 206100065 its reverse (560001602), we get a palindrome (766101667).

The spelling of 206100065 in words is "two hundred six million, one hundred thousand, sixty-five".