55318500 has 144 divisors (see below), whose sum is σ = 183980160. Its totient is φ = 13953600.

The previous prime is 55318489. The next prime is 55318507. The reversal of 55318500 is 581355.

55318500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55318507) 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 47 ways as a sum of consecutive naturals, for example, 85177 + ... + 85823.

It is an arithmetic number, because the mean of its divisors is an integer number (1277640).

Almost surely, 2^55318500 is an apocalyptic number.

55318500 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 55318500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91990080).

55318500 is an abundant number, since it is smaller than the sum of its proper divisors (128661660).

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

55318500 is a wasteful number, since it uses less digits than its factorization.

55318500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 55318500 is about 7437.6407549706. The cubic root of 55318500 is about 381.0279186767.

Adding to 55318500 its reverse (581355), we get a palindrome (55899855).

The spelling of 55318500 in words is "fifty-five million, three hundred eighteen thousand, five hundred".