80005217 has 4 divisors (see below), whose sum is σ = 80023956. Its totient is φ = 79986480.

The previous prime is 80005207. The next prime is 80005223. The reversal of 80005217 is 71250008.

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 10182481 + 69822736 = 3191^2 + 8356^2 .

It is a cyclic number.

It is not a de Polignac number, because 80005217 - 2⁸ = 80004961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80005192 and 80005201.

It is not an unprimeable number, because it can be changed into a prime (80005207) 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, 503 + ... + 12659.

It is an arithmetic number, because the mean of its divisors is an integer number (20005989).

Almost surely, 2^80005217 is an apocalyptic number.

It is an amenable number.

80005217 is a deficient number, since it is larger than the sum of its proper divisors (18739).

80005217 is a wasteful number, since it uses less digits than its factorization.

80005217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18738.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 80005217 is about 8944.5635444106. The cubic root of 80005217 is about 430.8963042076.

The spelling of 80005217 in words is "eighty million, five thousand, two hundred seventeen".