256451043 has 4 divisors (see below), whose sum is σ = 341934728. Its totient is φ = 170967360.

The previous prime is 256451021. The next prime is 256451053. The reversal of 256451043 is 340154652.

256451043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 256451043 - 2⁶ = 256450979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256451043.

It is not an unprimeable number, because it can be changed into a prime (256451053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42741838 + ... + 42741843.

It is an arithmetic number, because the mean of its divisors is an integer number (85483682).

Almost surely, 2^256451043 is an apocalyptic number.

256451043 is a deficient number, since it is larger than the sum of its proper divisors (85483685).

256451043 is an equidigital number, since it uses as much as digits as its factorization.

256451043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85483684.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 256451043 is about 16014.0888907237. The cubic root of 256451043 is about 635.3331114374. Note that the first 3 decimals are identical.

The spelling of 256451043 in words is "two hundred fifty-six million, four hundred fifty-one thousand, forty-three".