256330243 has 12 divisors (see below), whose sum is σ = 278514288. Its totient is φ = 235803360.

The previous prime is 256330231. The next prime is 256330247. The reversal of 256330243 is 342033652.

It is not a de Polignac number, because 256330243 - 2⁵ = 256330211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256330247) 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, 50121 + ... + 54997.

It is an arithmetic number, because the mean of its divisors is an integer number (23209524).

Almost surely, 2^256330243 is an apocalyptic number.

256330243 is a deficient number, since it is larger than the sum of its proper divisors (22184045).

256330243 is a wasteful number, since it uses less digits than its factorization.

256330243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5214 (or 5201 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 256330243 is about 16010.3167676345. The cubic root of 256330243 is about 635.2333389263.

Adding to 256330243 its reverse (342033652), we get a palindrome (598363895).

The spelling of 256330243 in words is "two hundred fifty-six million, three hundred thirty thousand, two hundred forty-three".