85981216 has 12 divisors (see below), whose sum is σ = 169275582. Its totient is φ = 42990592.

The previous prime is 85981187. The next prime is 85981249. The reversal of 85981216 is 61218958.

It can be written as a sum of positive squares in only one way, i.e., 71571600 + 14409616 = 8460^2 + 3796^2 .

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 as a sum of consecutive naturals, namely, 1343425 + ... + 1343488.

Almost surely, 2^85981216 is an apocalyptic number.

It is an amenable number.

85981216 is a deficient number, since it is larger than the sum of its proper divisors (83294366).

85981216 is a wasteful number, since it uses less digits than its factorization.

85981216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686923 (or 2686915 counting only the distinct ones).

The product of its digits is 34560, while the sum is 40.

The square root of 85981216 is about 9272.6056747820. The cubic root of 85981216 is about 441.3683572107.

The spelling of 85981216 in words is "eighty-five million, nine hundred eighty-one thousand, two hundred sixteen".