80999215 has 24 divisors (see below), whose sum is σ = 111502944. Its totient is φ = 56337600.

The previous prime is 80999209. The next prime is 80999227. The reversal of 80999215 is 51299908.

It is not a de Polignac number, because 80999215 - 2³ = 80999207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11005 + ... + 16825.

It is an arithmetic number, because the mean of its divisors is an integer number (4645956).

Almost surely, 2^80999215 is an apocalyptic number.

80999215 is a deficient number, since it is larger than the sum of its proper divisors (30503729).

80999215 is a wasteful number, since it uses less digits than its factorization.

80999215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871 (or 5860 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 80999215 is about 8999.9563887832. The cubic root of 80999215 is about 432.6734733520.

The spelling of 80999215 in words is "eighty million, nine hundred ninety-nine thousand, two hundred fifteen".