256006243 has 2 divisors, whose sum is σ = 256006244. Its totient is φ = 256006242.

The previous prime is 256006237. The next prime is 256006249. The reversal of 256006243 is 342600652.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (256006237) and next prime (256006249).

It is a cyclic number.

It is not a de Polignac number, because 256006243 - 2⁵ = 256006211 is a prime.

It is not a weakly prime, because it can be changed into another prime (256006249) 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 as a sum of consecutive naturals, namely, 128003121 + 128003122.

It is an arithmetic number, because the mean of its divisors is an integer number (128003122).

Almost surely, 2^256006243 is an apocalyptic number.

256006243 is a deficient number, since it is larger than the sum of its proper divisors (1).

256006243 is an equidigital number, since it uses as much as digits as its factorization.

256006243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 256006243 is about 16000.1950925606. The cubic root of 256006243 is about 634.9655822791.

Adding to 256006243 its reverse (342600652), we get a palindrome (598606895).

The spelling of 256006243 in words is "two hundred fifty-six million, six thousand, two hundred forty-three".