257384281243 has 2 divisors, whose sum is σ = 257384281244. Its totient is φ = 257384281242.

The previous prime is 257384281201. The next prime is 257384281289. The reversal of 257384281243 is 342182483752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257384281243 - 2⁹ = 257384280731 is a prime.

It is not a weakly prime, because it can be changed into another prime (257384281543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128692140621 + 128692140622.

It is an arithmetic number, because the mean of its divisors is an integer number (128692140622).

Almost surely, 2^257384281243 is an apocalyptic number.

257384281243 is a deficient number, since it is larger than the sum of its proper divisors (1).

257384281243 is an equidigital number, since it uses as much as digits as its factorization.

257384281243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 49.

The spelling of 257384281243 in words is "two hundred fifty-seven billion, three hundred eighty-four million, two hundred eighty-one thousand, two hundred forty-three".