99535521 has 8 divisors (see below), whose sum is σ = 132764320. Its totient is φ = 66331872.

The previous prime is 99535489. The next prime is 99535523. The reversal of 99535521 is 12553599.

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

It is not a de Polignac number, because 99535521 - 2⁵ = 99535489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99535521.

It is not an unprimeable number, because it can be changed into a prime (99535523) 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, 6906 + ... + 15708.

It is an arithmetic number, because the mean of its divisors is an integer number (16595540).

Almost surely, 2^99535521 is an apocalyptic number.

It is an amenable number.

99535521 is a deficient number, since it is larger than the sum of its proper divisors (33228799).

99535521 is a wasteful number, since it uses less digits than its factorization.

99535521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12575.

The product of its digits is 60750, while the sum is 39.

The square root of 99535521 is about 9976.7490195955. The cubic root of 99535521 is about 463.4391276571.

The spelling of 99535521 in words is "ninety-nine million, five hundred thirty-five thousand, five hundred twenty-one".