55188700 has 72 divisors (see below), whose sum is σ = 139748000. Its totient is φ = 18910080.

The previous prime is 55188677. The next prime is 55188767. The reversal of 55188700 is 788155.

55188700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 23 ways as a sum of consecutive naturals, for example, 33496 + ... + 35104.

Almost surely, 2^55188700 is an apocalyptic number.

55188700 is a gapful number since it is divisible by the number (50) 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 55188700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69874000).

55188700 is an abundant number, since it is smaller than the sum of its proper divisors (84559300).

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

55188700 is a wasteful number, since it uses less digits than its factorization.

55188700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 34.

The square root of 55188700 is about 7428.9097450433. The cubic root of 55188700 is about 380.7296691046.

The spelling of 55188700 in words is "fifty-five million, one hundred eighty-eight thousand, seven hundred".