99321155 has 8 divisors (see below), whose sum is σ = 119257152. Its totient is φ = 79409088.

The previous prime is 99321121. The next prime is 99321163. The reversal of 99321155 is 55112399.

It is a Cunningham number, because it is equal to 9966²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99321155 - 2¹⁰ = 99320131 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4982 + ... + 14948.

It is an arithmetic number, because the mean of its divisors is an integer number (14907144).

Almost surely, 2^99321155 is an apocalyptic number.

99321155 is a deficient number, since it is larger than the sum of its proper divisors (19935997).

99321155 is a wasteful number, since it uses less digits than its factorization.

99321155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11965.

The product of its digits is 12150, while the sum is 35.

The square root of 99321155 is about 9965.9999498294. Note that the first 4 decimals coincide. The cubic root of 99321155 is about 463.1061912491.

The spelling of 99321155 in words is "ninety-nine million, three hundred twenty-one thousand, one hundred fifty-five".