206040061 has 4 divisors (see below), whose sum is σ = 206095324. Its totient is φ = 205984800.

The previous prime is 206040011. The next prime is 206040071. The reversal of 206040061 is 160040602.

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 42328036 + 163712025 = 6506^2 + 12795^2 .

It is a cyclic number.

It is not a de Polignac number, because 206040061 - 2⁹ = 206039549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206040011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21600 + ... + 29641.

It is an arithmetic number, because the mean of its divisors is an integer number (51523831).

Almost surely, 2^206040061 is an apocalyptic number.

It is an amenable number.

206040061 is a deficient number, since it is larger than the sum of its proper divisors (55263).

206040061 is an equidigital number, since it uses as much as digits as its factorization.

206040061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55262.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 206040061 is about 14354.0956176277. The cubic root of 206040061 is about 590.6323403285.

Adding to 206040061 its reverse (160040602), we get a palindrome (366080663).

The spelling of 206040061 in words is "two hundred six million, forty thousand, sixty-one".