256344171 has 4 divisors (see below), whose sum is σ = 341792232. Its totient is φ = 170896112.

The previous prime is 256344149. The next prime is 256344191. The reversal of 256344171 is 171443652.

256344171 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 256344171 - 2⁷ = 256344043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256344191) 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, 42724026 + ... + 42724031.

It is an arithmetic number, because the mean of its divisors is an integer number (85448058).

Almost surely, 2^256344171 is an apocalyptic number.

256344171 is a deficient number, since it is larger than the sum of its proper divisors (85448061).

256344171 is an equidigital number, since it uses as much as digits as its factorization.

256344171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85448060.

The product of its digits is 20160, while the sum is 33.

The square root of 256344171 is about 16010.7517312586. The cubic root of 256344171 is about 635.2448440971.

The spelling of 256344171 in words is "two hundred fifty-six million, three hundred forty-four thousand, one hundred seventy-one".