55109824 has 112 divisors (see below), whose sum is σ = 139574016. Its totient is φ = 20966400.

The previous prime is 55109819. The next prime is 55109827. The reversal of 55109824 is 42890155.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 55109824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55109827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261079 + ... + 261289.

Almost surely, 2^55109824 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 55109824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69787008).

55109824 is an abundant number, since it is smaller than the sum of its proper divisors (84464192).

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

55109824 is a wasteful number, since it uses less digits than its factorization.

55109824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 55109824 is about 7423.5991271081. The cubic root of 55109824 is about 380.5482022989.

Adding to 55109824 its reverse (42890155), we get a palindrome (97999979).

The spelling of 55109824 in words is "fifty-five million, one hundred nine thousand, eight hundred twenty-four".