206427205 has 4 divisors (see below), whose sum is σ = 247712652. Its totient is φ = 165141760.

The previous prime is 206427187. The next prime is 206427227. The reversal of 206427205 is 502724602.

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 124144164 + 82283041 = 11142^2 + 9071^2 .

It is not a de Polignac number, because 206427205 - 2⁵ = 206427173 is a prime.

It is a super-2 number, since 2×206427205² = 85224381928224050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20642716 + ... + 20642725.

It is an arithmetic number, because the mean of its divisors is an integer number (61928163).

Almost surely, 2^206427205 is an apocalyptic number.

It is an amenable number.

206427205 is a deficient number, since it is larger than the sum of its proper divisors (41285447).

206427205 is an equidigital number, since it uses as much as digits as its factorization.

206427205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41285446.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 206427205 is about 14367.5747779505. The cubic root of 206427205 is about 591.0020365576.

The spelling of 206427205 in words is "two hundred six million, four hundred twenty-seven thousand, two hundred five".