80817205 has 32 divisors (see below), whose sum is σ = 114914304. Its totient is φ = 53415936.

The previous prime is 80817179. The next prime is 80817211. The reversal of 80817205 is 50271808.

It is not a de Polignac number, because 80817205 - 2¹¹ = 80815157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119749 + ... + 120421.

It is an arithmetic number, because the mean of its divisors is an integer number (3591072).

Almost surely, 2^80817205 is an apocalyptic number.

It is an amenable number.

80817205 is a deficient number, since it is larger than the sum of its proper divisors (34097099).

80817205 is a wasteful number, since it uses less digits than its factorization.

80817205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 80817205 is about 8989.8389863223. The cubic root of 80817205 is about 432.3491493916.

The spelling of 80817205 in words is "eighty million, eight hundred seventeen thousand, two hundred five".