2556218227 has 2 divisors, whose sum is σ = 2556218228. Its totient is φ = 2556218226.

The previous prime is 2556218173. The next prime is 2556218239. The reversal of 2556218227 is 7228126552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556218227 - 2⁷ = 2556218099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2556218227.

It is not a weakly prime, because it can be changed into another prime (2556218527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278109113 + 1278109114.

It is an arithmetic number, because the mean of its divisors is an integer number (1278109114).

Almost surely, 2^2556218227 is an apocalyptic number.

2556218227 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556218227 is an equidigital number, since it uses as much as digits as its factorization.

2556218227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 40.

The square root of 2556218227 is about 50559.0568246679. The cubic root of 2556218227 is about 1367.3068065264.

The spelling of 2556218227 in words is "two billion, five hundred fifty-six million, two hundred eighteen thousand, two hundred twenty-seven".