99992251 has 2 divisors, whose sum is σ = 99992252. Its totient is φ = 99992250.

The previous prime is 99992239. The next prime is 99992303. The reversal of 99992251 is 15229999.

It is a weak prime.

It is an emirp because it is prime and its reverse (15229999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99992251 - 2⁵ = 99992219 is a prime.

It is not a weakly prime, because it can be changed into another prime (99992051) 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, 49996125 + 49996126.

It is an arithmetic number, because the mean of its divisors is an integer number (49996126).

Almost surely, 2^99992251 is an apocalyptic number.

99992251 is a deficient number, since it is larger than the sum of its proper divisors (1).

99992251 is an equidigital number, since it uses as much as digits as its factorization.

99992251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131220, while the sum is 46.

The square root of 99992251 is about 9999.6125424938. The cubic root of 99992251 is about 464.1468938276.

The spelling of 99992251 in words is "ninety-nine million, nine hundred ninety-two thousand, two hundred fifty-one".