256204447 has 2 divisors, whose sum is σ = 256204448. Its totient is φ = 256204446.

The previous prime is 256204441. The next prime is 256204463. The reversal of 256204447 is 744402652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256204447 - 2³ = 256204439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256204441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128102223 + 128102224.

It is an arithmetic number, because the mean of its divisors is an integer number (128102224).

Almost surely, 2^256204447 is an apocalyptic number.

256204447 is a deficient number, since it is larger than the sum of its proper divisors (1).

256204447 is an equidigital number, since it uses as much as digits as its factorization.

256204447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 34.

The square root of 256204447 is about 16006.3876936678. The cubic root of 256204447 is about 635.1294067386.

The spelling of 256204447 in words is "two hundred fifty-six million, two hundred four thousand, four hundred forty-seven".