257203430571173 has 2 divisors, whose sum is σ = 257203430571174. Its totient is φ = 257203430571172.

The previous prime is 257203430571149. The next prime is 257203430571203. The reversal of 257203430571173 is 371175034302752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176882365882369 + 80321064688804 = 13299713^2 + 8962202^2 .

It is a cyclic number.

It is not a de Polignac number, because 257203430571173 - 2³⁰ = 257202356829349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257203430511173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128601715285586 + 128601715285587.

It is an arithmetic number, because the mean of its divisors is an integer number (128601715285587).

Almost surely, 2^{257203430571173} is an apocalyptic number.

It is an amenable number.

257203430571173 is a deficient number, since it is larger than the sum of its proper divisors (1).

257203430571173 is an equidigital number, since it uses as much as digits as its factorization.

257203430571173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 50.

The spelling of 257203430571173 in words is "two hundred fifty-seven trillion, two hundred three billion, four hundred thirty million, five hundred seventy-one thousand, one hundred seventy-three".