9999280215 has 12 divisors (see below), whose sum is σ = 17332085784. Its totient is φ = 5332949424.

The previous prime is 9999280189. The next prime is 9999280217. The reversal of 9999280215 is 5120829999.

It is not a de Polignac number, because 9999280215 - 2³² = 5704312919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999280217) 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 11 ways as a sum of consecutive naturals, for example, 111103069 + ... + 111103158.

It is an arithmetic number, because the mean of its divisors is an integer number (1444340482).

Almost surely, 2^9999280215 is an apocalyptic number.

9999280215 is a deficient number, since it is larger than the sum of its proper divisors (7332805569).

9999280215 is a wasteful number, since it uses less digits than its factorization.

9999280215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222206238 (or 222206235 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 54.

The square root of 9999280215 is about 99996.4010102364. The cubic root of 9999280215 is about 2154.3829977992.

The spelling of 9999280215 in words is "nine billion, nine hundred ninety-nine million, two hundred eighty thousand, two hundred fifteen".