256125231 has 12 divisors (see below), whose sum is σ = 377830752. Its totient is φ = 167116896.

The previous prime is 256125227. The next prime is 256125251. The reversal of 256125231 is 132521652.

It is a happy number.

256125231 is a `hidden beast` number, since 25 + 612 + 5 + 23 + 1 = 666.

256125231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256125231 - 2² = 256125227 is a prime.

It is a super-2 number, since 2×256125231² = 131200267909606722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256125195 and 256125204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256125251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 302326 + ... + 303171.

It is an arithmetic number, because the mean of its divisors is an integer number (31485896).

Almost surely, 2^256125231 is an apocalyptic number.

256125231 is a deficient number, since it is larger than the sum of its proper divisors (121705521).

256125231 is a wasteful number, since it uses less digits than its factorization.

256125231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605550 (or 605547 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 256125231 is about 16003.9129902658. The cubic root of 256125231 is about 635.0639413158.

Adding to 256125231 its reverse (132521652), we get a palindrome (388646883).

The spelling of 256125231 in words is "two hundred fifty-six million, one hundred twenty-five thousand, two hundred thirty-one".