2201161 has 2 divisors, whose sum is σ = 2201162. Its totient is φ = 2201160.

The previous prime is 2201149. The next prime is 2201183. The reversal of 2201161 is 1611022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2119936 + 81225 = 1456^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201161 - 2⁷ = 2201033 is a prime.

It is not a weakly prime, because it can be changed into another prime (2201191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100580 + 1100581.

It is an arithmetic number, because the mean of its divisors is an integer number (1100581).

2^2201161 is an apocalyptic number.

2201161 is the 664-th centered decagonal number.

It is an amenable number.

2201161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201161 is an equidigital number, since it uses as much as digits as its factorization.

2201161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2201161 is about 1483.6310188184. The cubic root of 2201161 is about 130.0820192477.

Adding to 2201161 its reverse (1611022), we get a palindrome (3812183).

The spelling of 2201161 in words is "two million, two hundred one thousand, one hundred sixty-one".