99251531422097 has 2 divisors, whose sum is σ = 99251531422098. Its totient is φ = 99251531422096.

The previous prime is 99251531422067. The next prime is 99251531422237. The reversal of 99251531422097 is 79022413515299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96211753120081 + 3039778302016 = 9808759^2 + 1743496^2 .

It is a cyclic number.

It is not a de Polignac number, because 99251531422097 - 2¹⁸ = 99251531159953 is a prime.

It is not a weakly prime, because it can be changed into another prime (99251531422067) 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, 49625765711048 + 49625765711049.

It is an arithmetic number, because the mean of its divisors is an integer number (49625765711049).

Almost surely, 2^{99251531422097} is an apocalyptic number.

It is an amenable number.

99251531422097 is a deficient number, since it is larger than the sum of its proper divisors (1).

99251531422097 is an equidigital number, since it uses as much as digits as its factorization.

99251531422097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 99251531422097 in words is "ninety-nine trillion, two hundred fifty-one billion, five hundred thirty-one million, four hundred twenty-two thousand, ninety-seven".