256463243 has 4 divisors (see below), whose sum is σ = 263394720. Its totient is φ = 249531768.

The previous prime is 256463239. The next prime is 256463261. The reversal of 256463243 is 342364652.

256463243 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 a cyclic number.

It is not a de Polignac number, because 256463243 - 2² = 256463239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256463293) 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, 3465683 + ... + 3465756.

It is an arithmetic number, because the mean of its divisors is an integer number (65848680).

Almost surely, 2^256463243 is an apocalyptic number.

256463243 is a deficient number, since it is larger than the sum of its proper divisors (6931477).

256463243 is an equidigital number, since it uses as much as digits as its factorization.

256463243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6931476.

The product of its digits is 103680, while the sum is 35.

The square root of 256463243 is about 16014.4698007770. The cubic root of 256463243 is about 635.3431860583.

The spelling of 256463243 in words is "two hundred fifty-six million, four hundred sixty-three thousand, two hundred forty-three".