256206311 has 2 divisors, whose sum is σ = 256206312. Its totient is φ = 256206310.

The previous prime is 256206299. The next prime is 256206323. The reversal of 256206311 is 113602652.

It is a balanced prime because it is at equal distance from previous prime (256206299) and next prime (256206323).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256206311 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 (256206211) 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, 128103155 + 128103156.

It is an arithmetic number, because the mean of its divisors is an integer number (128103156).

Almost surely, 2^256206311 is an apocalyptic number.

256206311 is a deficient number, since it is larger than the sum of its proper divisors (1).

256206311 is an equidigital number, since it uses as much as digits as its factorization.

256206311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 256206311 is about 16006.4459203160. The cubic root of 256206311 is about 635.1309470168.

Adding to 256206311 its reverse (113602652), we get a palindrome (369808963).

The spelling of 256206311 in words is "two hundred fifty-six million, two hundred six thousand, three hundred eleven".