205012166 has 8 divisors (see below), whose sum is σ = 323703480. Its totient is φ = 97111008.

The previous prime is 205012141. The next prime is 205012217. The reversal of 205012166 is 661210502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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, 2697491 + ... + 2697566.

It is an arithmetic number, because the mean of its divisors is an integer number (40462935).

Almost surely, 2^205012166 is an apocalyptic number.

205012166 is a deficient number, since it is larger than the sum of its proper divisors (118691314).

205012166 is a wasteful number, since it uses less digits than its factorization.

205012166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5395078.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 205012166 is about 14318.2459121221. The cubic root of 205012166 is about 589.6485180297.

Adding to 205012166 its reverse (661210502), we get a palindrome (866222668).

The spelling of 205012166 in words is "two hundred five million, twelve thousand, one hundred sixty-six".