99279517215 has 24 divisors (see below), whose sum is σ = 163256461200. Its totient is φ = 51518009088.

The previous prime is 99279517187. The next prime is 99279517243. The reversal of 99279517215 is 51271597299.

It is an interprime number because it is at equal distance from previous prime (99279517187) and next prime (99279517243).

It is not a de Polignac number, because 99279517215 - 2¹⁰ = 99279516191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2396790 + ... + 2437859.

It is an arithmetic number, because the mean of its divisors is an integer number (6802352550).

Almost surely, 2^99279517215 is an apocalyptic number.

99279517215 is a deficient number, since it is larger than the sum of its proper divisors (63976943985).

99279517215 is a wasteful number, since it uses less digits than its factorization.

99279517215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834731 (or 4834694 counting only the distinct ones).

The product of its digits is 3572100, while the sum is 57.

The spelling of 99279517215 in words is "ninety-nine billion, two hundred seventy-nine million, five hundred seventeen thousand, two hundred fifteen".