207222978817 has 2 divisors, whose sum is σ = 207222978818. Its totient is φ = 207222978816.

The previous prime is 207222978791. The next prime is 207222978871. The reversal of 207222978817 is 718879222702.

207222978817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (207222978871) 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., 204535489536 + 2687489281 = 452256^2 + 51841^2 .

It is a cyclic number.

It is not a de Polignac number, because 207222978817 - 2⁷ = 207222978689 is a prime.

It is not a weakly prime, because it can be changed into another prime (207222978617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103611489408 + 103611489409.

It is an arithmetic number, because the mean of its divisors is an integer number (103611489409).

Almost surely, 2^207222978817 is an apocalyptic number.

It is an amenable number.

207222978817 is a deficient number, since it is larger than the sum of its proper divisors (1).

207222978817 is an equidigital number, since it uses as much as digits as its factorization.

207222978817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3161088, while the sum is 55.

The spelling of 207222978817 in words is "two hundred seven billion, two hundred twenty-two million, nine hundred seventy-eight thousand, eight hundred seventeen".