256055999 has 2 divisors, whose sum is σ = 256056000. Its totient is φ = 256055998.

The previous prime is 256055971. The next prime is 256056037. The reversal of 256055999 is 999550652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256055999 - 2¹² = 256051903 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 (256055909) 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, 128027999 + 128028000.

It is an arithmetic number, because the mean of its divisors is an integer number (128028000).

Almost surely, 2^256055999 is an apocalyptic number.

256055999 is a deficient number, since it is larger than the sum of its proper divisors (1).

256055999 is an equidigital number, since it uses as much as digits as its factorization.

256055999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1093500, while the sum is 50.

The square root of 256055999 is about 16001.7498730608. The cubic root of 256055999 is about 635.0067157824.

The spelling of 256055999 in words is "two hundred fifty-six million, fifty-five thousand, nine hundred ninety-nine".