2217801601 has 2 divisors, whose sum is σ = 2217801602. Its totient is φ = 2217801600.

The previous prime is 2217801559. The next prime is 2217801637. The reversal of 2217801601 is 1061087122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296072001 + 921729600 = 36001^2 + 30360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2217801601 - 2¹¹ = 2217799553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2217801601.

It is not a weakly prime, because it can be changed into another prime (2217801671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108900800 + 1108900801.

It is an arithmetic number, because the mean of its divisors is an integer number (1108900801).

Almost surely, 2^2217801601 is an apocalyptic number.

It is an amenable number.

2217801601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217801601 is an equidigital number, since it uses as much as digits as its factorization.

2217801601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 2217801601 is about 47093.5409690119. The cubic root of 2217801601 is about 1304.0899986264.

Adding to 2217801601 its reverse (1061087122), we get a palindrome (3278888723).

The spelling of 2217801601 in words is "two billion, two hundred seventeen million, eight hundred one thousand, six hundred one".