218001227 has 2 divisors, whose sum is σ = 218001228. Its totient is φ = 218001226.

The previous prime is 218001209. The next prime is 218001229. The reversal of 218001227 is 722100812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218001227 - 2⁶ = 218001163 is a prime.

Together with 218001229, 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 (218001229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109000613 + 109000614.

It is an arithmetic number, because the mean of its divisors is an integer number (109000614).

Almost surely, 2^218001227 is an apocalyptic number.

218001227 is a deficient number, since it is larger than the sum of its proper divisors (1).

218001227 is an equidigital number, since it uses as much as digits as its factorization.

218001227 is an odious number, because the sum of its binary digits is odd.

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

The square root of 218001227 is about 14764.8646116380. The cubic root of 218001227 is about 601.8472946303.

The spelling of 218001227 in words is "two hundred eighteen million, one thousand, two hundred twenty-seven".