256427011 has 2 divisors, whose sum is σ = 256427012. Its totient is φ = 256427010.

The previous prime is 256426993. The next prime is 256427047. The reversal of 256427011 is 110724652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256427011 - 2⁷ = 256426883 is a prime.

It is not a weakly prime, because it can be changed into another prime (256427081) 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, 128213505 + 128213506.

It is an arithmetic number, because the mean of its divisors is an integer number (128213506).

Almost surely, 2^256427011 is an apocalyptic number.

256427011 is a deficient number, since it is larger than the sum of its proper divisors (1).

256427011 is an equidigital number, since it uses as much as digits as its factorization.

256427011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 256427011 is about 16013.3385338598. The cubic root of 256427011 is about 635.3132651514.

The spelling of 256427011 in words is "two hundred fifty-six million, four hundred twenty-seven thousand, eleven".