201161005 has 8 divisors (see below), whose sum is σ = 242645112. Its totient is φ = 160094208.

The previous prime is 201161003. The next prime is 201161027. The reversal of 201161005 is 500161102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 116964 + 201044041 = 342^2 + 14179^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201161005 - 2¹ = 201161003 is a prime.

It is a super-2 number, since 2×201161005² = 80931499865220050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201161005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201161003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103264 + ... + 105193.

It is an arithmetic number, because the mean of its divisors is an integer number (30330639).

Almost surely, 2^201161005 is an apocalyptic number.

It is an amenable number.

201161005 is a deficient number, since it is larger than the sum of its proper divisors (41484107).

201161005 is a wasteful number, since it uses less digits than its factorization.

201161005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208655.

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

The square root of 201161005 is about 14183.1239506676. The cubic root of 201161005 is about 585.9329647602.

The spelling of 201161005 in words is "two hundred one million, one hundred sixty-one thousand, five".