80865515 has 16 divisors (see below), whose sum is σ = 106064640. Its totient is φ = 58920960.

The previous prime is 80865503. The next prime is 80865517. The reversal of 80865515 is 51556808.

It is not a de Polignac number, because 80865515 - 2⁶ = 80865451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80865517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12710 + ... + 17979.

It is an arithmetic number, because the mean of its divisors is an integer number (6629040).

Almost surely, 2^80865515 is an apocalyptic number.

80865515 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

80865515 is a deficient number, since it is larger than the sum of its proper divisors (25199125).

80865515 is a wasteful number, since it uses less digits than its factorization.

80865515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30742.

The product of its (nonzero) digits is 48000, while the sum is 38.

The square root of 80865515 is about 8992.5255073311. The cubic root of 80865515 is about 432.4352805026.

The spelling of 80865515 in words is "eighty million, eight hundred sixty-five thousand, five hundred fifteen".