256252771 has 2 divisors, whose sum is σ = 256252772. Its totient is φ = 256252770.

The previous prime is 256252751. The next prime is 256252783. The reversal of 256252771 is 177252652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256252771 - 2⁵ = 256252739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256252771.

It is not a weakly prime, because it can be changed into another prime (256252751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128126385 + 128126386.

It is an arithmetic number, because the mean of its divisors is an integer number (128126386).

Almost surely, 2^256252771 is an apocalyptic number.

256252771 is a deficient number, since it is larger than the sum of its proper divisors (1).

256252771 is an equidigital number, since it uses as much as digits as its factorization.

256252771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 37.

The square root of 256252771 is about 16007.8971448470. The cubic root of 256252771 is about 635.1693358712.

The spelling of 256252771 in words is "two hundred fifty-six million, two hundred fifty-two thousand, seven hundred seventy-one".