256116171 has 8 divisors (see below), whose sum is σ = 345602880. Its totient is φ = 168686792.

The previous prime is 256116167. The next prime is 256116173. The reversal of 256116171 is 171611652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256116171 - 2² = 256116167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256116173) 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 in 7 ways as a sum of consecutive naturals, for example, 514041 + ... + 514538.

It is an arithmetic number, because the mean of its divisors is an integer number (43200360).

Almost surely, 2^256116171 is an apocalyptic number.

256116171 is a deficient number, since it is larger than the sum of its proper divisors (89486709).

256116171 is a wasteful number, since it uses less digits than its factorization.

256116171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028665.

The product of its digits is 2520, while the sum is 30.

The square root of 256116171 is about 16003.6299319873. The cubic root of 256116171 is about 635.0564531206.

The spelling of 256116171 in words is "two hundred fifty-six million, one hundred sixteen thousand, one hundred seventy-one".