256378271 has 2 divisors, whose sum is σ = 256378272. Its totient is φ = 256378270.

The previous prime is 256378259. The next prime is 256378301. The reversal of 256378271 is 172873652.

256378271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256378271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256378471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128189135 + 128189136.

It is an arithmetic number, because the mean of its divisors is an integer number (128189136).

Almost surely, 2^256378271 is an apocalyptic number.

256378271 is a deficient number, since it is larger than the sum of its proper divisors (1).

256378271 is an equidigital number, since it uses as much as digits as its factorization.

256378271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 41.

The square root of 256378271 is about 16011.8166052450. The cubic root of 256378271 is about 635.2730105119.

The spelling of 256378271 in words is "two hundred fifty-six million, three hundred seventy-eight thousand, two hundred seventy-one".