55989216 has 72 divisors (see below), whose sum is σ = 161880264. Its totient is φ = 18351360.

The previous prime is 55989191. The next prime is 55989229. The reversal of 55989216 is 61298955.

55989216 is a `hidden beast` number, since 559 + 8 + 92 + 1 + 6 = 666.

55989216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

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 11 ways as a sum of consecutive naturals, for example, 15975 + ... + 19161.

It is an arithmetic number, because the mean of its divisors is an integer number (2248337).

Almost surely, 2^55989216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55989216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80940132).

55989216 is an abundant number, since it is smaller than the sum of its proper divisors (105891048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55989216 is a wasteful number, since it uses less digits than its factorization.

55989216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264 (or 3253 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 55989216 is about 7482.5942025477. The cubic root of 55989216 is about 382.5616765852.

The spelling of 55989216 in words is "fifty-five million, nine hundred eighty-nine thousand, two hundred sixteen".