4245321205217 has 2 divisors, whose sum is σ = 4245321205218. Its totient is φ = 4245321205216.

The previous prime is 4245321205201. The next prime is 4245321205253. The reversal of 4245321205217 is 7125021235424.

4245321205217 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3915111224896 + 330209980321 = 1978664^2 + 574639^2 .

It is a cyclic number.

It is not a de Polignac number, because 4245321205217 - 2⁴ = 4245321205201 is a prime.

It is not a weakly prime, because it can be changed into another prime (4245321207217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2122660602608 + 2122660602609.

It is an arithmetic number, because the mean of its divisors is an integer number (2122660602609).

Almost surely, 2^{4245321205217} is an apocalyptic number.

It is an amenable number.

4245321205217 is a deficient number, since it is larger than the sum of its proper divisors (1).

4245321205217 is an equidigital number, since it uses as much as digits as its factorization.

4245321205217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 4245321205217 in words is "four trillion, two hundred forty-five billion, three hundred twenty-one million, two hundred five thousand, two hundred seventeen".