99218125 has 10 divisors (see below), whose sum is σ = 123983750. Its totient is φ = 79374000.

The previous prime is 99218111. The next prime is 99218131. The reversal of 99218125 is 52181299.

It can be written as a sum of positive squares in 5 ways, for example, as 72777961 + 26440164 = 8531^2 + 5142^2 .

It is not a de Polignac number, because 99218125 - 2¹⁵ = 99185357 is a prime.

It is a congruent number.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 78750 + ... + 79999.

It is an arithmetic number, because the mean of its divisors is an integer number (12398375).

Almost surely, 2^99218125 is an apocalyptic number.

It is an amenable number.

99218125 is a deficient number, since it is larger than the sum of its proper divisors (24765625).

99218125 is an equidigital number, since it uses as much as digits as its factorization.

99218125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158769 (or 158754 counting only the distinct ones).

The product of its digits is 12960, while the sum is 37.

The square root of 99218125 is about 9960.8295337286. The cubic root of 99218125 is about 462.9460026873.

The spelling of 99218125 in words is "ninety-nine million, two hundred eighteen thousand, one hundred twenty-five".