55055100 has 144 divisors (see below), whose sum is σ = 169989120. Its totient is φ = 13728000.

The previous prime is 55055089. The next prime is 55055107. The reversal of 55055100 is 155055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55055107) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 545050 + ... + 545150.

It is an arithmetic number, because the mean of its divisors is an integer number (1180480).

Almost surely, 2^55055100 is an apocalyptic number.

55055100 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 55055100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84994560).

55055100 is an abundant number, since it is smaller than the sum of its proper divisors (114934020).

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

55055100 is a wasteful number, since it uses less digits than its factorization.

55055100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 21.

The square root of 55055100 is about 7419.9123984047. The cubic root of 55055100 is about 380.4221992549.

It can be divided in two parts, 55055 and 100, that added together give a palindrome (55155).

The spelling of 55055100 in words is "fifty-five million, fifty-five thousand, one hundred".