256775543 has 2 divisors, whose sum is σ = 256775544. Its totient is φ = 256775542.

The previous prime is 256775527. The next prime is 256775549. The reversal of 256775543 is 345577652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256775543 - 2⁴ = 256775527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256775494 and 256775503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256775549) 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, 128387771 + 128387772.

It is an arithmetic number, because the mean of its divisors is an integer number (128387772).

Almost surely, 2^256775543 is an apocalyptic number.

256775543 is a deficient number, since it is larger than the sum of its proper divisors (1).

256775543 is an equidigital number, since it uses as much as digits as its factorization.

256775543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 44.

The square root of 256775543 is about 16024.2173911864. The cubic root of 256775543 is about 635.6009711378.

The spelling of 256775543 in words is "two hundred fifty-six million, seven hundred seventy-five thousand, five hundred forty-three".