80857185 has 16 divisors (see below), whose sum is σ = 136982016. Its totient is φ = 40587008.

The previous prime is 80857177. The next prime is 80857229. The reversal of 80857185 is 58175808.

It is a cyclic number.

It is not a de Polignac number, because 80857185 - 2³ = 80857177 is a prime.

It is a super-2 number, since 2×80857185² = 13075768732248450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158289 + ... + 158798.

It is an arithmetic number, because the mean of its divisors is an integer number (8561376).

Almost surely, 2^80857185 is an apocalyptic number.

80857185 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

80857185 is a deficient number, since it is larger than the sum of its proper divisors (56124831).

80857185 is a wasteful number, since it uses less digits than its factorization.

80857185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317112.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 80857185 is about 8992.0623329690. The cubic root of 80857185 is about 432.4204315295.

The spelling of 80857185 in words is "eighty million, eight hundred fifty-seven thousand, one hundred eighty-five".