2201661565 has 16 divisors (see below), whose sum is σ = 2680419456. Its totient is φ = 1735876800.

The previous prime is 2201661563. The next prime is 2201661577. The reversal of 2201661565 is 5651661022.

2201661565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2201661565 - 2¹ = 2201661563 is a prime.

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 2201661565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201661563) 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, 98535 + ... + 118795.

It is an arithmetic number, because the mean of its divisors is an integer number (167526216).

Almost surely, 2^2201661565 is an apocalyptic number.

It is an amenable number.

2201661565 is a deficient number, since it is larger than the sum of its proper divisors (478757891).

2201661565 is a wasteful number, since it uses less digits than its factorization.

2201661565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20580.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2201661565 is about 46921.8665975683. The cubic root of 2201661565 is about 1300.9187913081.

The spelling of 2201661565 in words is "two billion, two hundred one million, six hundred sixty-one thousand, five hundred sixty-five".