256355347 has 2 divisors, whose sum is σ = 256355348. Its totient is φ = 256355346.

The previous prime is 256355327. The next prime is 256355357. The reversal of 256355347 is 743553652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256355347 - 2⁷ = 256355219 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256355317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128177673 + 128177674.

It is an arithmetic number, because the mean of its divisors is an integer number (128177674).

Almost surely, 2^256355347 is an apocalyptic number.

256355347 is a deficient number, since it is larger than the sum of its proper divisors (1).

256355347 is an equidigital number, since it uses as much as digits as its factorization.

256355347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 378000, while the sum is 40.

The square root of 256355347 is about 16011.1007429221. The cubic root of 256355347 is about 635.2540756876.

The spelling of 256355347 in words is "two hundred fifty-six million, three hundred fifty-five thousand, three hundred forty-seven".