550005500 has 72 divisors (see below), whose sum is σ = 1320485712. Its totient is φ = 199980000.

The previous prime is 550005497. The next prime is 550005517. The reversal of 550005500 is 5500055.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55955 + ... + 65045.

Almost surely, 2^550005500 is an apocalyptic number.

550005500 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 550005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660242856).

550005500 is an abundant number, since it is smaller than the sum of its proper divisors (770480212).

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

550005500 is a wasteful number, since it uses less digits than its factorization.

550005500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9132 (or 9109 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 550005500 is about 23452.1960592180. The cubic root of 550005500 is about 819.3240016624.

Adding to 550005500 its reverse (5500055), we get a palindrome (555505555).

Subtracting from 550005500 its reverse (5500055), we obtain a palindrome (544505445).

550005500 divided by its reverse (5500055) gives a square (100 = 10²).

The spelling of 550005500 in words is "five hundred fifty million, five thousand, five hundred".