99717225 has 72 divisors (see below), whose sum is σ = 181416960. Its totient is φ = 48263040.

The previous prime is 99717217. The next prime is 99717227. The reversal of 99717225 is 52271799.

It is not a de Polignac number, because 99717225 - 2³ = 99717217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99717227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 785112 + ... + 785238.

It is an arithmetic number, because the mean of its divisors is an integer number (2519680).

Almost surely, 2^99717225 is an apocalyptic number.

99717225 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

99717225 is a deficient number, since it is larger than the sum of its proper divisors (81699735).

99717225 is a wasteful number, since it uses less digits than its factorization.

99717225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 183 counting only the distinct ones).

The product of its digits is 79380, while the sum is 42.

The square root of 99717225 is about 9985.8512406304. The cubic root of 99717225 is about 463.7209618966.

The spelling of 99717225 in words is "ninety-nine million, seven hundred seventeen thousand, two hundred twenty-five".