55224120 has 128 divisors (see below), whose sum is σ = 195955200. Its totient is φ = 12182016.

The previous prime is 55224119. The next prime is 55224121. The reversal of 55224120 is 2142255.

It is a happy number.

55224120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55224119) and next prime (55224121).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55224121) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 23227 + ... + 25493.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^55224120 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 55224120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97977600).

55224120 is an abundant number, since it is smaller than the sum of its proper divisors (140731080).

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

55224120 is a wasteful number, since it uses less digits than its factorization.

55224120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317 (or 2313 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55224120 is about 7431.2932925568. The cubic root of 55224120 is about 380.8111022056.

Adding to 55224120 its reverse (2142255), we get a palindrome (57366375).

The spelling of 55224120 in words is "fifty-five million, two hundred twenty-four thousand, one hundred twenty".