99298221 has 32 divisors (see below), whose sum is σ = 148420608. Its totient is φ = 58544640.

The previous prime is 99298217. The next prime is 99298231. The reversal of 99298221 is 12289299.

99298221 = T₁₀₅ + T₁₀₆ + ... + T₈₄₁.

It is a happy number.

It is not a de Polignac number, because 99298221 - 2² = 99298217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99298201) 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 in 31 ways as a sum of consecutive naturals, for example, 214236 + ... + 214698.

It is an arithmetic number, because the mean of its divisors is an integer number (4638144).

Almost surely, 2^99298221 is an apocalyptic number.

It is an amenable number.

99298221 is a deficient number, since it is larger than the sum of its proper divisors (49122387).

99298221 is a wasteful number, since it uses less digits than its factorization.

99298221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641.

The product of its digits is 46656, while the sum is 42.

The square root of 99298221 is about 9964.8492713136. The cubic root of 99298221 is about 463.0705436069.

The spelling of 99298221 in words is "ninety-nine million, two hundred ninety-eight thousand, two hundred twenty-one".