80520217 has 8 divisors (see below), whose sum is σ = 84124224. Its totient is φ = 76924848.

The previous prime is 80520199. The next prime is 80520221. The reversal of 80520217 is 71202508.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 80520217 - 2¹¹ = 80518169 is a prime.

It is a super-4 number, since 4×80520217⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80520191 and 80520200.

It is not an unprimeable number, because it can be changed into a prime (80520227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23538 + ... + 26740.

It is an arithmetic number, because the mean of its divisors is an integer number (10515528).

Almost surely, 2^80520217 is an apocalyptic number.

It is an amenable number.

80520217 is a deficient number, since it is larger than the sum of its proper divisors (3604007).

80520217 is a wasteful number, since it uses less digits than its factorization.

80520217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4319.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 80520217 is about 8973.3058010969. The cubic root of 80520217 is about 431.8188987843.

The spelling of 80520217 in words is "eighty million, five hundred twenty thousand, two hundred seventeen".