83216985 has 16 divisors (see below), whose sum is σ = 133272000. Its totient is φ = 44340800.

The previous prime is 83216977. The next prime is 83217011. The reversal of 83216985 is 58961238.

It is not a de Polignac number, because 83216985 - 2³ = 83216977 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20635 + ... + 24335.

It is an arithmetic number, because the mean of its divisors is an integer number (8329500).

Almost surely, 2^83216985 is an apocalyptic number.

It is an amenable number.

83216985 is a deficient number, since it is larger than the sum of its proper divisors (50055015).

83216985 is a wasteful number, since it uses less digits than its factorization.

83216985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208.

The product of its digits is 103680, while the sum is 42.

The square root of 83216985 is about 9122.3344051838. The cubic root of 83216985 is about 436.5868584277.

It can be divided in two parts, 8321 and 6985, that multiplied together give a palindrome (58122185).

The spelling of 83216985 in words is "eighty-three million, two hundred sixteen thousand, nine hundred eighty-five".