256310243 has 8 divisors (see below), whose sum is σ = 293056512. Its totient is φ = 219596616.

The previous prime is 256310237. The next prime is 256310281. The reversal of 256310243 is 342013652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256310243 - 2¹⁶ = 256244707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256310543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11996 + ... + 25622.

It is an arithmetic number, because the mean of its divisors is an integer number (36632064).

Almost surely, 2^256310243 is an apocalyptic number.

256310243 is a deficient number, since it is larger than the sum of its proper divisors (36746269).

256310243 is a wasteful number, since it uses less digits than its factorization.

256310243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16321.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 256310243 is about 16009.6921581897. The cubic root of 256310243 is about 635.2168172743.

Adding to 256310243 its reverse (342013652), we get a palindrome (598323895).

The spelling of 256310243 in words is "two hundred fifty-six million, three hundred ten thousand, two hundred forty-three".