99155217 has 8 divisors (see below), whose sum is σ = 151093696. Its totient is φ = 56660112.

The previous prime is 99155171. The next prime is 99155249. The reversal of 99155217 is 71255199.

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

It is not a de Polignac number, because 99155217 - 2⁸ = 99154961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99155297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2360818 + ... + 2360859.

It is an arithmetic number, because the mean of its divisors is an integer number (18886712).

Almost surely, 2^99155217 is an apocalyptic number.

It is an amenable number.

99155217 is a deficient number, since it is larger than the sum of its proper divisors (51938479).

99155217 is a wasteful number, since it uses less digits than its factorization.

99155217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721687.

The product of its digits is 28350, while the sum is 39.

The square root of 99155217 is about 9957.6712639050. The cubic root of 99155217 is about 462.8481403114.

The spelling of 99155217 in words is "ninety-nine million, one hundred fifty-five thousand, two hundred seventeen".