83220085 has 8 divisors (see below), whose sum is σ = 107546040. Its totient is φ = 61454784.

The previous prime is 83220079. The next prime is 83220091. The reversal of 83220085 is 58002238.

It is an interprime number because it is at equal distance from previous prime (83220079) and next prime (83220091).

It can be written as a sum of positive squares in 4 ways, for example, as 209764 + 83010321 = 458^2 + 9111^2 .

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 83220085 - 2¹⁵ = 83187317 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640090 + ... + 640219.

It is an arithmetic number, because the mean of its divisors is an integer number (13443255).

Almost surely, 2^83220085 is an apocalyptic number.

It is an amenable number.

83220085 is a deficient number, since it is larger than the sum of its proper divisors (24325955).

83220085 is a wasteful number, since it uses less digits than its factorization.

83220085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280327.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 83220085 is about 9122.5043162500. The cubic root of 83220085 is about 436.5922796064.

The spelling of 83220085 in words is "eighty-three million, two hundred twenty thousand, eighty-five".