80243305 has 4 divisors (see below), whose sum is σ = 96291972. Its totient is φ = 64194640.

The previous prime is 80243291. The next prime is 80243311. The reversal of 80243305 is 50334208.

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 63792169 + 16451136 = 7987^2 + 4056^2 .

It is not a de Polignac number, because 80243305 - 2¹¹ = 80241257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80243305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8024326 + ... + 8024335.

It is an arithmetic number, because the mean of its divisors is an integer number (24072993).

Almost surely, 2^80243305 is an apocalyptic number.

It is an amenable number.

80243305 is a deficient number, since it is larger than the sum of its proper divisors (16048667).

80243305 is a wasteful number, since it uses less digits than its factorization.

80243305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16048666.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 80243305 is about 8957.8627473299. The cubic root of 80243305 is about 431.3233165273.

The spelling of 80243305 in words is "eighty million, two hundred forty-three thousand, three hundred five".