256055801 has 2 divisors, whose sum is σ = 256055802. Its totient is φ = 256055800.

The previous prime is 256055797. The next prime is 256055881. The reversal of 256055801 is 108550652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228765625 + 27290176 = 15125^2 + 5224^2 .

It is a cyclic number.

It is not a de Polignac number, because 256055801 - 2² = 256055797 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256055881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128027900 + 128027901.

It is an arithmetic number, because the mean of its divisors is an integer number (128027901).

Almost surely, 2^256055801 is an apocalyptic number.

It is an amenable number.

256055801 is a deficient number, since it is larger than the sum of its proper divisors (1).

256055801 is an equidigital number, since it uses as much as digits as its factorization.

256055801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 256055801 is about 16001.7436862362. The cubic root of 256055801 is about 635.0065521055.

The spelling of 256055801 in words is "two hundred fifty-six million, fifty-five thousand, eight hundred one".