2181227 has 2 divisors, whose sum is σ = 2181228. Its totient is φ = 2181226.

The previous prime is 2181217. The next prime is 2181229. The reversal of 2181227 is 7221812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2181227 - 2¹⁴ = 2164843 is a prime.

Together with 2181229, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2181229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090613 + 1090614.

It is an arithmetic number, because the mean of its divisors is an integer number (1090614).

2^2181227 is an apocalyptic number.

2181227 is a deficient number, since it is larger than the sum of its proper divisors (1).

2181227 is an equidigital number, since it uses as much as digits as its factorization.

2181227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 448, while the sum is 23.

The square root of 2181227 is about 1476.8977622029. The cubic root of 2181227 is about 129.6881479718.

The spelling of 2181227 in words is "two million, one hundred eighty-one thousand, two hundred twenty-seven".