55055500 has 48 divisors (see below), whose sum is σ = 121212000. Its totient is φ = 21844800.

The previous prime is 55055479. The next prime is 55055569. The reversal of 55055500 is 555055.

It is a super-2 number, since 2×55055500² = 6062216160500000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74131 + ... + 74869.

It is an arithmetic number, because the mean of its divisors is an integer number (2525250).

Almost surely, 2^55055500 is an apocalyptic number.

55055500 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 55055500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60606000).

55055500 is an abundant number, since it is smaller than the sum of its proper divisors (66156500).

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

55055500 is a wasteful number, since it uses less digits than its factorization.

55055500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 895 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 55055500 is about 7419.9393528519. The cubic root of 55055500 is about 380.4231205653.

It can be divided in two parts, 55055 and 500, that added together give a palindrome (55555).

The spelling of 55055500 in words is "fifty-five million, fifty-five thousand, five hundred".