83881216 has 18 divisors (see below), whose sum is σ = 167435282. Its totient is φ = 41940480.

The previous prime is 83881201. The next prime is 83881249. The reversal of 83881216 is 61218838.

It can be written as a sum of positive squares in only one way, i.e., 44943616 + 38937600 = 6704^2 + 6240^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163575 + ... + 164086.

Almost surely, 2^83881216 is an apocalyptic number.

It is an amenable number.

83881216 is a deficient number, since it is larger than the sum of its proper divisors (83554066).

83881216 is an equidigital number, since it uses as much as digits as its factorization.

83881216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327677 (or 327663 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 83881216 is about 9158.6688989176. The cubic root of 83881216 is about 437.7453813672.

It can be divided in two parts, 8388 and 1216, that added together give a square (9604 = 98²).

The spelling of 83881216 in words is "eighty-three million, eight hundred eighty-one thousand, two hundred sixteen".