55115424 has 192 divisors, whose sum is σ = 198132480. Its totient is φ = 14515200.

The previous prime is 55115419. The next prime is 55115441. The reversal of 55115424 is 42451155.

55115424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 31 ways as a sum of consecutive naturals, for example, 78274 + ... + 78974.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^55115424 is an apocalyptic number.

55115424 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55115424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99066240).

55115424 is an abundant number, since it is smaller than the sum of its proper divisors (143017056).

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

55115424 is a wasteful number, since it uses less digits than its factorization.

55115424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 726 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 55115424 is about 7423.9762930656. The cubic root of 55115424 is about 380.5610916992.

Adding to 55115424 its reverse (42451155), we get a palindrome (97566579).

The spelling of 55115424 in words is "fifty-five million, one hundred fifteen thousand, four hundred twenty-four".