256811112 has 48 divisors (see below), whose sum is σ = 736447140. Its totient is φ = 80567808.

The previous prime is 256811111. The next prime is 256811141. The reversal of 256811112 is 211118652.

It can be written as a sum of positive squares in 2 ways, for example, as 192265956 + 64545156 = 13866^2 + 8034^2 .

It is not an unprimeable number, because it can be changed into a prime (256811111) 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 11 ways as a sum of consecutive naturals, for example, 103683 + ... + 106130.

Almost surely, 2^256811112 is an apocalyptic number.

It is an amenable number.

256811112 is an abundant number, since it is smaller than the sum of its proper divisors (479636028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256811112 is a wasteful number, since it uses less digits than its factorization.

256811112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209842 (or 209835 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 256811112 is about 16025.3272041478. The cubic root of 256811112 is about 635.6303179711.

Adding to 256811112 its reverse (211118652), we get a palindrome (467929764).

The spelling of 256811112 in words is "two hundred fifty-six million, eight hundred eleven thousand, one hundred twelve".