256107171 has 4 divisors (see below), whose sum is σ = 341476232. Its totient is φ = 170738112.

The previous prime is 256107169. The next prime is 256107179. The reversal of 256107171 is 171701652.

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

It is not a de Polignac number, because 256107171 - 2¹ = 256107169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256107179) 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, 42684526 + ... + 42684531.

It is an arithmetic number, because the mean of its divisors is an integer number (85369058).

Almost surely, 2^256107171 is an apocalyptic number.

256107171 is a deficient number, since it is larger than the sum of its proper divisors (85369061).

256107171 is an equidigital number, since it uses as much as digits as its factorization.

256107171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85369060.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 256107171 is about 16003.3487433099. The cubic root of 256107171 is about 635.0490143413.

The spelling of 256107171 in words is "two hundred fifty-six million, one hundred seven thousand, one hundred seventy-one".