201017985 has 16 divisors (see below), whose sum is σ = 367575936. Its totient is φ = 91893888.

The previous prime is 201017959. The next prime is 201017987. The reversal of 201017985 is 589710102.

It is not a de Polignac number, because 201017985 - 2¹¹ = 201015937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201017987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 957124 + ... + 957333.

It is an arithmetic number, because the mean of its divisors is an integer number (22973496).

Almost surely, 2^201017985 is an apocalyptic number.

It is an amenable number.

201017985 is a deficient number, since it is larger than the sum of its proper divisors (166557951).

201017985 is a wasteful number, since it uses less digits than its factorization.

201017985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914472.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 201017985 is about 14178.0811466150. The cubic root of 201017985 is about 585.7940710411.

The spelling of 201017985 in words is "two hundred one million, seventeen thousand, nine hundred eighty-five".