2201761 has 2 divisors, whose sum is σ = 2201762. Its totient is φ = 2201760.

The previous prime is 2201743. The next prime is 2201807. The reversal of 2201761 is 1671022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 893025 = 1144^2 + 945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2201761 is a prime.

It is a super-2 number, since 2×2201761² = 9695503002242, which contains 22 as substring.

It is a Chen prime.

2201761 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2201711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100880 + 1100881.

It is an arithmetic number, because the mean of its divisors is an integer number (1100881).

2^2201761 is an apocalyptic number.

It is an amenable number.

2201761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201761 is an equidigital number, since it uses as much as digits as its factorization.

2201761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2201761 is about 1483.8332116515. The cubic root of 2201761 is about 130.0938375746.

Adding to 2201761 its reverse (1671022), we get a palindrome (3872783).

The spelling of 2201761 in words is "two million, two hundred one thousand, seven hundred sixty-one".