256354523 has 2 divisors, whose sum is σ = 256354524. Its totient is φ = 256354522.

The previous prime is 256354499. The next prime is 256354541. The reversal of 256354523 is 325453652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256354523 - 2⁶ = 256354459 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (256354123) 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, 128177261 + 128177262.

It is an arithmetic number, because the mean of its divisors is an integer number (128177262).

Almost surely, 2^256354523 is an apocalyptic number.

256354523 is a deficient number, since it is larger than the sum of its proper divisors (1).

256354523 is an equidigital number, since it uses as much as digits as its factorization.

256354523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 35.

The square root of 256354523 is about 16011.0750107543. The cubic root of 256354523 is about 635.2533950569.

The spelling of 256354523 in words is "two hundred fifty-six million, three hundred fifty-four thousand, five hundred twenty-three".