99216523 has 30 divisors (see below), whose sum is σ = 122381292. Its totient is φ = 80385480.

The previous prime is 99216517. The next prime is 99216527. The reversal of 99216523 is 32561299.

It is not a de Polignac number, because 99216523 - 2⁹ = 99216011 is a prime.

It is a Duffinian number.

Its product of digits (29160) is a multiple of the sum of its prime divisors (81).

It is not an unprimeable number, because it can be changed into a prime (99216527) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2307340 + ... + 2307382.

Almost surely, 2^99216523 is an apocalyptic number.

99216523 is a deficient number, since it is larger than the sum of its proper divisors (23164769).

99216523 is an frugal number, since it uses more digits than its factorization.

99216523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 81 counting only the distinct ones).

The product of its digits is 29160, while the sum is 37.

The square root of 99216523 is about 9960.7491184147. The cubic root of 99216523 is about 462.9435110610.

The spelling of 99216523 in words is "ninety-nine million, two hundred sixteen thousand, five hundred twenty-three".