80221685 has 8 divisors (see below), whose sum is σ = 99585720. Its totient is φ = 61964224.

The previous prime is 80221679. The next prime is 80221699. The reversal of 80221685 is 58612208.

It can be written as a sum of positive squares in 4 ways, for example, as 10699441 + 69522244 = 3271^2 + 8338^2 .

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 80221685 - 2¹⁸ = 79959541 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276482 + ... + 276771.

It is an arithmetic number, because the mean of its divisors is an integer number (12448215).

Almost surely, 2^80221685 is an apocalyptic number.

It is an amenable number.

80221685 is a deficient number, since it is larger than the sum of its proper divisors (19364035).

80221685 is a wasteful number, since it uses less digits than its factorization.

80221685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553287.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 80221685 is about 8956.6559049681. The cubic root of 80221685 is about 431.2845758177.

The spelling of 80221685 in words is "eighty million, two hundred twenty-one thousand, six hundred eighty-five".