99228161 has 2 divisors, whose sum is σ = 99228162. Its totient is φ = 99228160.

The previous prime is 99228121. The next prime is 99228163. The reversal of 99228161 is 16182299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86583025 + 12645136 = 9305^2 + 3556^2 .

It is a cyclic number.

It is not a de Polignac number, because 99228161 - 2¹⁰ = 99227137 is a prime.

Together with 99228163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99228163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49614080 + 49614081.

It is an arithmetic number, because the mean of its divisors is an integer number (49614081).

Almost surely, 2^99228161 is an apocalyptic number.

It is an amenable number.

99228161 is a deficient number, since it is larger than the sum of its proper divisors (1).

99228161 is an equidigital number, since it uses as much as digits as its factorization.

99228161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 38.

The square root of 99228161 is about 9961.3332942935. Note that the first 3 decimals coincide. The cubic root of 99228161 is about 462.9616112919.

The spelling of 99228161 in words is "ninety-nine million, two hundred twenty-eight thousand, one hundred sixty-one".