2217001 has 2 divisors, whose sum is σ = 2217002. Its totient is φ = 2217000.

The previous prime is 2216999. The next prime is 2217011. The reversal of 2217001 is 1007122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2027776 + 189225 = 1424^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 2217001 - 2¹ = 2216999 is a prime.

Together with 2216999, it forms a pair of twin primes.

2217001 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2217011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108500 + 1108501.

It is an arithmetic number, because the mean of its divisors is an integer number (1108501).

2^2217001 is an apocalyptic number.

It is an amenable number.

2217001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217001 is an equidigital number, since it uses as much as digits as its factorization.

2217001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 2217001 is about 1488.9597039544. The cubic root of 2217001 is about 130.3933059218.

The spelling of 2217001 in words is "two million, two hundred seventeen thousand, one".