2217251 has 2 divisors, whose sum is σ = 2217252. Its totient is φ = 2217250.

The previous prime is 2217247. The next prime is 2217277. The reversal of 2217251 is 1527122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2217251 - 2² = 2217247 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2217211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108625 + 1108626.

It is an arithmetic number, because the mean of its divisors is an integer number (1108626).

2^2217251 is an apocalyptic number.

2217251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217251 is an equidigital number, since it uses as much as digits as its factorization.

2217251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280, while the sum is 20.

The square root of 2217251 is about 1489.0436528188. The cubic root of 2217251 is about 130.3982070023.

The spelling of 2217251 in words is "two million, two hundred seventeen thousand, two hundred fifty-one".