256377171 has 8 divisors (see below), whose sum is σ = 342171280. Its totient is φ = 170750592.

The previous prime is 256377169. The next prime is 256377211. The reversal of 256377171 is 171773652.

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

It is not a de Polignac number, because 256377171 - 2¹ = 256377169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256377101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38266 + ... + 44463.

It is an arithmetic number, because the mean of its divisors is an integer number (42771410).

Almost surely, 2^256377171 is an apocalyptic number.

256377171 is a deficient number, since it is larger than the sum of its proper divisors (85794109).

256377171 is a wasteful number, since it uses less digits than its factorization.

256377171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83765.

The product of its digits is 61740, while the sum is 39.

The square root of 256377171 is about 16011.7822555767. The cubic root of 256377171 is about 635.2721019569.

The spelling of 256377171 in words is "two hundred fifty-six million, three hundred seventy-seven thousand, one hundred seventy-one".