256448851 has 2 divisors, whose sum is σ = 256448852. Its totient is φ = 256448850.

The previous prime is 256448849. The next prime is 256448897. The reversal of 256448851 is 158844652.

256448851 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 not a de Polignac number, because 256448851 - 2¹ = 256448849 is a prime.

Together with 256448849, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 256448798 and 256448807.

It is not a weakly prime, because it can be changed into another prime (256448651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128224425 + 128224426.

It is an arithmetic number, because the mean of its divisors is an integer number (128224426).

Almost surely, 2^256448851 is an apocalyptic number.

256448851 is a deficient number, since it is larger than the sum of its proper divisors (1).

256448851 is an equidigital number, since it uses as much as digits as its factorization.

256448851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 307200, while the sum is 43.

The square root of 256448851 is about 16014.0204508424. The cubic root of 256448851 is about 635.3313012750.

It can be divided in two parts, 2564 and 48851, that added together give a palindrome (51415).

The spelling of 256448851 in words is "two hundred fifty-six million, four hundred forty-eight thousand, eight hundred fifty-one".