2209217 has 2 divisors, whose sum is σ = 2209218. Its totient is φ = 2209216.

The previous prime is 2209213. The next prime is 2209231. The reversal of 2209217 is 7129022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 952576 = 1121^2 + 976^2 .

It is a cyclic number.

It is not a de Polignac number, because 2209217 - 2² = 2209213 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2209192 and 2209201.

It is not a weakly prime, because it can be changed into another prime (2209213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104608 + 1104609.

It is an arithmetic number, because the mean of its divisors is an integer number (1104609).

2^2209217 is an apocalyptic number.

It is an amenable number.

2209217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2209217 is an equidigital number, since it uses as much as digits as its factorization.

2209217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2209217 is about 1486.3435000026. The cubic root of 2209217 is about 130.2405211916.

The spelling of 2209217 in words is "two million, two hundred nine thousand, two hundred seventeen".