257455223 has 2 divisors, whose sum is σ = 257455224. Its totient is φ = 257455222.

The previous prime is 257455207. The next prime is 257455229. The reversal of 257455223 is 322554752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257455223 - 2⁴ = 257455207 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257455229) 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, 128727611 + 128727612.

It is an arithmetic number, because the mean of its divisors is an integer number (128727612).

Almost surely, 2^257455223 is an apocalyptic number.

257455223 is a deficient number, since it is larger than the sum of its proper divisors (1).

257455223 is an equidigital number, since it uses as much as digits as its factorization.

257455223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 35.

The square root of 257455223 is about 16045.4112755018. The cubic root of 257455223 is about 636.1612849598.

The spelling of 257455223 in words is "two hundred fifty-seven million, four hundred fifty-five thousand, two hundred twenty-three".