7247208217 has 2 divisors, whose sum is σ = 7247208218. Its totient is φ = 7247208216.

The previous prime is 7247208173. The next prime is 7247208251. The reversal of 7247208217 is 7128027427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6794540041 + 452668176 = 82429^2 + 21276^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7247208217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7247208217.

It is not a weakly prime, because it can be changed into another prime (7247208277) 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, 3623604108 + 3623604109.

It is an arithmetic number, because the mean of its divisors is an integer number (3623604109).

Almost surely, 2^7247208217 is an apocalyptic number.

It is an amenable number.

7247208217 is a deficient number, since it is larger than the sum of its proper divisors (1).

7247208217 is an equidigital number, since it uses as much as digits as its factorization.

7247208217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87808, while the sum is 40.

The square root of 7247208217 is about 85130.5363368515. The cubic root of 7247208217 is about 1935.1898597388.

The spelling of 7247208217 in words is "seven billion, two hundred forty-seven million, two hundred eight thousand, two hundred seventeen".