256206323 has 2 divisors, whose sum is σ = 256206324. Its totient is φ = 256206322.

The previous prime is 256206311. The next prime is 256206359. The reversal of 256206323 is 323602652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256206323 - 2¹⁸ = 255944179 is a prime.

It is not a weakly prime, because it can be changed into another prime (256206373) 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, 128103161 + 128103162.

It is an arithmetic number, because the mean of its divisors is an integer number (128103162).

Almost surely, 2^256206323 is an apocalyptic number.

256206323 is a deficient number, since it is larger than the sum of its proper divisors (1).

256206323 is an equidigital number, since it uses as much as digits as its factorization.

256206323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 256206323 is about 16006.4462951650. The cubic root of 256206323 is about 635.1309569327.

Adding to 256206323 its reverse (323602652), we get a palindrome (579808975).

The spelling of 256206323 in words is "two hundred fifty-six million, two hundred six thousand, three hundred twenty-three".