257371144 has 8 divisors (see below), whose sum is σ = 482570910. Its totient is φ = 128685568.

The previous prime is 257371141. The next prime is 257371151. The reversal of 257371144 is 441173752.

It can be written as a sum of positive squares in only one way, i.e., 147331044 + 110040100 = 12138^2 + 10490^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (257371141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16085689 + ... + 16085704.

Almost surely, 2^257371144 is an apocalyptic number.

It is an amenable number.

257371144 is a deficient number, since it is larger than the sum of its proper divisors (225199766).

257371144 is a wasteful number, since it uses less digits than its factorization.

257371144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32171399 (or 32171395 counting only the distinct ones).

The product of its digits is 23520, while the sum is 34.

The square root of 257371144 is about 16042.7910289949. The cubic root of 257371144 is about 636.0920255008.

The spelling of 257371144 in words is "two hundred fifty-seven million, three hundred seventy-one thousand, one hundred forty-four".