256443250 has 32 divisors (see below), whose sum is σ = 548645760. Its totient is φ = 87922800.

The previous prime is 256443241. The next prime is 256443287. The reversal of 256443250 is 52344652.

256443250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 71520 + ... + 75019.

It is an arithmetic number, because the mean of its divisors is an integer number (17145180).

Almost surely, 2^256443250 is an apocalyptic number.

256443250 is an abundant number, since it is smaller than the sum of its proper divisors (292202510).

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

256443250 is a wasteful number, since it uses less digits than its factorization.

256443250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146563 (or 146553 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 256443250 is about 16013.8455718794. The cubic root of 256443250 is about 635.3266758997.

The spelling of 256443250 in words is "two hundred fifty-six million, four hundred forty-three thousand, two hundred fifty".