55212248 has 64 divisors (see below), whose sum is σ = 128520000. Its totient is φ = 21652992.

The previous prime is 55212239. The next prime is 55212253. The reversal of 55212248 is 84221255.

55212248 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55212248.

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 15 ways as a sum of consecutive naturals, for example, 108218 + ... + 108726.

It is an arithmetic number, because the mean of its divisors is an integer number (2008125).

Almost surely, 2^55212248 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 55212248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64260000).

55212248 is an abundant number, since it is smaller than the sum of its proper divisors (73307752).

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

55212248 is a wasteful number, since it uses less digits than its factorization.

55212248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 680 counting only the distinct ones).

The product of its digits is 6400, while the sum is 29.

The square root of 55212248 is about 7430.4944653771. The cubic root of 55212248 is about 380.7838115132.

The spelling of 55212248 in words is "fifty-five million, two hundred twelve thousand, two hundred forty-eight".