256546313 has 2 divisors, whose sum is σ = 256546314. Its totient is φ = 256546312.

The previous prime is 256546261. The next prime is 256546331. The reversal of 256546313 is 313645652.

Together with next prime (256546331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 252269689 + 4276624 = 15883^2 + 2068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256546313 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (256546343) 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, 128273156 + 128273157.

It is an arithmetic number, because the mean of its divisors is an integer number (128273157).

Almost surely, 2^256546313 is an apocalyptic number.

It is an amenable number.

256546313 is a deficient number, since it is larger than the sum of its proper divisors (1).

256546313 is an equidigital number, since it uses as much as digits as its factorization.

256546313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 35.

The square root of 256546313 is about 16017.0631827436. The cubic root of 256546313 is about 635.4117758238.

The spelling of 256546313 in words is "two hundred fifty-six million, five hundred forty-six thousand, three hundred thirteen".