256535144 has 16 divisors (see below), whose sum is σ = 481212900. Its totient is φ = 128211712.

The previous prime is 256535107. The next prime is 256535177. The reversal of 256535144 is 441535652.

256535144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 206267044 + 50268100 = 14362^2 + 7090^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17642 + ... + 28710.

Almost surely, 2^256535144 is an apocalyptic number.

It is an amenable number.

256535144 is a deficient number, since it is larger than the sum of its proper divisors (224677756).

256535144 is a wasteful number, since it uses less digits than its factorization.

256535144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13972 (or 13968 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The square root of 256535144 is about 16016.7145195262. The cubic root of 256535144 is about 635.4025545945.

The spelling of 256535144 in words is "two hundred fifty-six million, five hundred thirty-five thousand, one hundred forty-four".