55111824 has 120 divisors (see below), whose sum is σ = 167132160. Its totient is φ = 16886784.

The previous prime is 55111801. The next prime is 55111843. The reversal of 55111824 is 42811155.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114817 + ... + 115295.

It is an arithmetic number, because the mean of its divisors is an integer number (1392768).

Almost surely, 2^55111824 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 55111824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83566080).

55111824 is an abundant number, since it is smaller than the sum of its proper divisors (112020336).

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

55111824 is a wasteful number, since it uses less digits than its factorization.

55111824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 548 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 55111824 is about 7423.7338314355. The cubic root of 55111824 is about 380.5528057564.

Adding to 55111824 its reverse (42811155), we get a palindrome (97922979).

The spelling of 55111824 in words is "fifty-five million, one hundred eleven thousand, eight hundred twenty-four".