2201843661 has 4 divisors (see below), whose sum is σ = 2935791552. Its totient is φ = 1467895772.

The previous prime is 2201843641. The next prime is 2201843701. The reversal of 2201843661 is 1663481022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2201843661 - 2⁵ = 2201843629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201843641) 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 3 ways as a sum of consecutive naturals, for example, 366973941 + ... + 366973946.

It is an arithmetic number, because the mean of its divisors is an integer number (733947888).

Almost surely, 2^2201843661 is an apocalyptic number.

It is an amenable number.

2201843661 is a deficient number, since it is larger than the sum of its proper divisors (733947891).

2201843661 is an equidigital number, since it uses as much as digits as its factorization.

2201843661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733947890.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 2201843661 is about 46923.8069747117. The cubic root of 2201843661 is about 1300.9546559753.

The spelling of 2201843661 in words is "two billion, two hundred one million, eight hundred forty-three thousand, six hundred sixty-one".