55543300 has 36 divisors (see below), whose sum is σ = 122242176. Its totient is φ = 21901600.

The previous prime is 55543297. The next prime is 55543333. The reversal of 55543300 is 334555.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3189 + ... + 11011.

It is an arithmetic number, because the mean of its divisors is an integer number (3395616).

Almost surely, 2^55543300 is an apocalyptic number.

55543300 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 55543300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61121088).

55543300 is an abundant number, since it is smaller than the sum of its proper divisors (66698876).

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

55543300 is a wasteful number, since it uses less digits than its factorization.

55543300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7908 (or 7901 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 55543300 is about 7452.7377519942. The cubic root of 55543300 is about 381.5433539030.

Adding to 55543300 its reverse (334555), we get a palindrome (55877855).

The spelling of 55543300 in words is "fifty-five million, five hundred forty-three thousand, three hundred".