257552171 has 2 divisors, whose sum is σ = 257552172. Its totient is φ = 257552170.

The previous prime is 257552149. The next prime is 257552173. The reversal of 257552171 is 171255752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257552171 is a prime.

Together with 257552173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257552173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128776085 + 128776086.

It is an arithmetic number, because the mean of its divisors is an integer number (128776086).

Almost surely, 2^257552171 is an apocalyptic number.

257552171 is a deficient number, since it is larger than the sum of its proper divisors (1).

257552171 is an equidigital number, since it uses as much as digits as its factorization.

257552171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24500, while the sum is 35.

The square root of 257552171 is about 16048.4320417915. The cubic root of 257552171 is about 636.2411264480.

The spelling of 257552171 in words is "two hundred fifty-seven million, five hundred fifty-two thousand, one hundred seventy-one".