201011605 has 16 divisors (see below), whose sum is σ = 252134784. Its totient is φ = 153552960.

The previous prime is 201011599. The next prime is 201011609. The reversal of 201011605 is 506110102.

It is a happy number.

It is not a de Polignac number, because 201011605 - 2¹⁹ = 200487317 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 (201011609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89395 + ... + 91615.

It is an arithmetic number, because the mean of its divisors is an integer number (15758424).

Almost surely, 2^201011605 is an apocalyptic number.

It is an amenable number.

201011605 is a deficient number, since it is larger than the sum of its proper divisors (51123179).

201011605 is a wasteful number, since it uses less digits than its factorization.

201011605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 201011605 is about 14177.8561496441. The cubic root of 201011605 is about 585.7878735762.

Adding to 201011605 its reverse (506110102), we get a palindrome (707121707).

The spelling of 201011605 in words is "two hundred one million, eleven thousand, six hundred five".