8512518197 has 2 divisors, whose sum is σ = 8512518198. Its totient is φ = 8512518196.

The previous prime is 8512518169. The next prime is 8512518199. The reversal of 8512518197 is 7918152158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8232658756 + 279859441 = 90734^2 + 16729^2 .

It is a cyclic number.

It is not a de Polignac number, because 8512518197 - 2²⁰ = 8511469621 is a prime.

It is a super-2 number, since 2×8512518197² (a number of 21 digits) contains 22 as substring.

Together with 8512518199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8512518199) 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, 4256259098 + 4256259099.

It is an arithmetic number, because the mean of its divisors is an integer number (4256259099).

Almost surely, 2^8512518197 is an apocalyptic number.

It is an amenable number.

8512518197 is a deficient number, since it is larger than the sum of its proper divisors (1).

8512518197 is an equidigital number, since it uses as much as digits as its factorization.

8512518197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 47.

The square root of 8512518197 is about 92263.3090507814. The cubic root of 8512518197 is about 2041.8289215497.

The spelling of 8512518197 in words is "eight billion, five hundred twelve million, five hundred eighteen thousand, one hundred ninety-seven".