80715205 has 4 divisors (see below), whose sum is σ = 96858252. Its totient is φ = 64572160.

The previous prime is 80715203. The next prime is 80715221. The reversal of 80715205 is 50251708.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9042049 + 71673156 = 3007^2 + 8466^2 .

It is not a de Polignac number, because 80715205 - 2¹ = 80715203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80715203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8071516 + ... + 8071525.

It is an arithmetic number, because the mean of its divisors is an integer number (24214563).

Almost surely, 2^80715205 is an apocalyptic number.

It is an amenable number.

80715205 is a deficient number, since it is larger than the sum of its proper divisors (16143047).

80715205 is a wasteful number, since it uses less digits than its factorization.

80715205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16143046.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 80715205 is about 8984.1641236122. The cubic root of 80715205 is about 432.1671824491.

The spelling of 80715205 in words is "eighty million, seven hundred fifteen thousand, two hundred five".