256555027 has 2 divisors, whose sum is σ = 256555028. Its totient is φ = 256555026.

The previous prime is 256554989. The next prime is 256555063. The reversal of 256555027 is 720555652.

It is a happy number.

256555027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256555027 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256552027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128277513 + 128277514.

It is an arithmetic number, because the mean of its divisors is an integer number (128277514).

Almost surely, 2^256555027 is an apocalyptic number.

256555027 is a deficient number, since it is larger than the sum of its proper divisors (1).

256555027 is an equidigital number, since it uses as much as digits as its factorization.

256555027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 256555027 is about 16017.3352028357. The cubic root of 256555027 is about 635.4189699966.

The spelling of 256555027 in words is "two hundred fifty-six million, five hundred fifty-five thousand, twenty-seven".