256214417 has 2 divisors, whose sum is σ = 256214418. Its totient is φ = 256214416.

The previous prime is 256214401. The next prime is 256214471. The reversal of 256214417 is 714412652.

Together with next prime (256214471) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237283216 + 18931201 = 15404^2 + 4351^2 .

It is a cyclic number.

It is not a de Polignac number, because 256214417 - 2⁴ = 256214401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256214017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128107208 + 128107209.

It is an arithmetic number, because the mean of its divisors is an integer number (128107209).

Almost surely, 2^256214417 is an apocalyptic number.

It is an amenable number.

256214417 is a deficient number, since it is larger than the sum of its proper divisors (1).

256214417 is an equidigital number, since it uses as much as digits as its factorization.

256214417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 256214417 is about 16006.6991288023. The cubic root of 256214417 is about 635.1376451567.

The spelling of 256214417 in words is "two hundred fifty-six million, two hundred fourteen thousand, four hundred seventeen".