9725222315257 has 2 divisors, whose sum is σ = 9725222315258. Its totient is φ = 9725222315256.

The previous prime is 9725222315239. The next prime is 9725222315261. The reversal of 9725222315257 is 7525132225279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9636920626921 + 88301688336 = 3104339^2 + 297156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9725222315257 is a prime.

It is not a weakly prime, because it can be changed into another prime (9725222315267) 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, 4862611157628 + 4862611157629.

It is an arithmetic number, because the mean of its divisors is an integer number (4862611157629).

Almost surely, 2^{9725222315257} is an apocalyptic number.

It is an amenable number.

9725222315257 is a deficient number, since it is larger than the sum of its proper divisors (1).

9725222315257 is an equidigital number, since it uses as much as digits as its factorization.

9725222315257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292000, while the sum is 52.

The spelling of 9725222315257 in words is "nine trillion, seven hundred twenty-five billion, two hundred twenty-two million, three hundred fifteen thousand, two hundred fifty-seven".