55216860 has 24 divisors (see below), whose sum is σ = 154607376. Its totient is φ = 14724480.

The previous prime is 55216853. The next prime is 55216871. The reversal of 55216860 is 6861255.

55216860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 460081 + ... + 460200.

It is an arithmetic number, because the mean of its divisors is an integer number (6441974).

Almost surely, 2^55216860 is an apocalyptic number.

It is an amenable number.

55216860 is an abundant number, since it is smaller than the sum of its proper divisors (99390516).

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

55216860 is a wasteful number, since it uses less digits than its factorization.

55216860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920293 (or 920291 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 55216860 is about 7430.8048016349. The cubic root of 55216860 is about 380.7944137865.

The spelling of 55216860 in words is "fifty-five million, two hundred sixteen thousand, eight hundred sixty".