9997555241 has 2 divisors, whose sum is σ = 9997555242. Its totient is φ = 9997555240.

The previous prime is 9997555231. The next prime is 9997555297. The reversal of 9997555241 is 1425557999.

9997555241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (9997555297) can be obtained adding 9997555241 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5870777641 + 4126777600 = 76621^2 + 64240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9997555241 is a prime.

It is a super-2 number, since 2×9997555241² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9997555231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998777620 + 4998777621.

It is an arithmetic number, because the mean of its divisors is an integer number (4998777621).

Almost surely, 2^9997555241 is an apocalyptic number.

It is an amenable number.

9997555241 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997555241 is an equidigital number, since it uses as much as digits as its factorization.

9997555241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5103000, while the sum is 56.

The square root of 9997555241 is about 99987.7754578028. The cubic root of 9997555241 is about 2154.2591066025.

The spelling of 9997555241 in words is "nine billion, nine hundred ninety-seven million, five hundred fifty-five thousand, two hundred forty-one".