2166558227 has 2 divisors, whose sum is σ = 2166558228. Its totient is φ = 2166558226.

The previous prime is 2166558223. The next prime is 2166558241. The reversal of 2166558227 is 7228556612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2166558227 - 2² = 2166558223 is a prime.

It is not a weakly prime, because it can be changed into another prime (2166558223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083279113 + 1083279114.

It is an arithmetic number, because the mean of its divisors is an integer number (1083279114).

Almost surely, 2^2166558227 is an apocalyptic number.

2166558227 is a deficient number, since it is larger than the sum of its proper divisors (1).

2166558227 is an equidigital number, since it uses as much as digits as its factorization.

2166558227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 44.

The square root of 2166558227 is about 46546.3019691146. The cubic root of 2166558227 is about 1293.9677580918.

The spelling of 2166558227 in words is "two billion, one hundred sixty-six million, five hundred fifty-eight thousand, two hundred twenty-seven".