206605145 has 16 divisors (see below), whose sum is σ = 264288000. Its totient is φ = 154597248.

The previous prime is 206605117. The next prime is 206605163. The reversal of 206605145 is 541506602.

It is a cyclic number.

It is not a de Polignac number, because 206605145 - 2⁸ = 206604889 is a prime.

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, 6260 + ... + 21269.

It is an arithmetic number, because the mean of its divisors is an integer number (16518000).

Almost surely, 2^206605145 is an apocalyptic number.

It is an amenable number.

206605145 is a deficient number, since it is larger than the sum of its proper divisors (57682855).

206605145 is a wasteful number, since it uses less digits than its factorization.

206605145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27632.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 206605145 is about 14373.7658600660. The cubic root of 206605145 is about 591.1718021336.

The spelling of 206605145 in words is "two hundred six million, six hundred five thousand, one hundred forty-five".