257171323 has 4 divisors (see below), whose sum is σ = 257426208. Its totient is φ = 256916440.

The previous prime is 257171293. The next prime is 257171353. The reversal of 257171323 is 323171752.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (257171293) and next prime (257171353).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257171323 is a prime.

It is a super-2 number, since 2×257171323² = 132274178747140658, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257171353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125923 + ... + 127948.

It is an arithmetic number, because the mean of its divisors is an integer number (64356552).

Almost surely, 2^257171323 is an apocalyptic number.

257171323 is a deficient number, since it is larger than the sum of its proper divisors (254885).

257171323 is a wasteful number, since it uses less digits than its factorization.

257171323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254884.

The product of its digits is 8820, while the sum is 31.

The square root of 257171323 is about 16036.5620692217. The cubic root of 257171323 is about 635.9273638748.

The spelling of 257171323 in words is "two hundred fifty-seven million, one hundred seventy-one thousand, three hundred twenty-three".