256232871 has 6 divisors (see below), whose sum is σ = 370114160. Its totient is φ = 170821908.

The previous prime is 256232863. The next prime is 256232923. The reversal of 256232871 is 178232652.

256232871 is a `hidden beast` number, since 2 + 5 + 623 + 28 + 7 + 1 = 666.

It is not a de Polignac number, because 256232871 - 2³ = 256232863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256232671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14235151 + ... + 14235168.

Almost surely, 2^256232871 is an apocalyptic number.

256232871 is a deficient number, since it is larger than the sum of its proper divisors (113881289).

256232871 is a wasteful number, since it uses less digits than its factorization.

256232871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28470325 (or 28470322 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 256232871 is about 16007.2755645675. The cubic root of 256232871 is about 635.1528935163.

The spelling of 256232871 in words is "two hundred fifty-six million, two hundred thirty-two thousand, eight hundred seventy-one".