256136327 has 2 divisors, whose sum is σ = 256136328. Its totient is φ = 256136326.

The previous prime is 256136261. The next prime is 256136347. The reversal of 256136327 is 723631652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256136327 - 2¹² = 256132231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256136347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128068163 + 128068164.

It is an arithmetic number, because the mean of its divisors is an integer number (128068164).

Almost surely, 2^256136327 is an apocalyptic number.

256136327 is a deficient number, since it is larger than the sum of its proper divisors (1).

256136327 is an equidigital number, since it uses as much as digits as its factorization.

256136327 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 35.

The square root of 256136327 is about 16004.2596517302. The cubic root of 256136327 is about 635.0731120480.

Adding to 256136327 its reverse (723631652), we get a palindrome (979767979).

The spelling of 256136327 in words is "two hundred fifty-six million, one hundred thirty-six thousand, three hundred twenty-seven".