55103500 has 48 divisors (see below), whose sum is σ = 121185792. Its totient is φ = 21888000.

The previous prime is 55103491. The next prime is 55103501. The reversal of 55103500 is 530155.

It is not an unprimeable number, because it can be changed into a prime (55103501) 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, 95212 + ... + 95788.

It is an arithmetic number, because the mean of its divisors is an integer number (2524704).

Almost surely, 2^55103500 is an apocalyptic number.

55103500 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 55103500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60592896).

55103500 is an abundant number, since it is smaller than the sum of its proper divisors (66082292).

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

55103500 is a wasteful number, since it uses less digits than its factorization.

55103500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 55103500 is about 7423.1731759403. The cubic root of 55103500 is about 380.5336454334.

Adding to 55103500 its reverse (530155), we get a palindrome (55633655).

The spelling of 55103500 in words is "fifty-five million, one hundred three thousand, five hundred".