550005555 has 64 divisors (see below), whose sum is σ = 1029086208. Its totient is φ = 248117760.

The previous prime is 550005551. The next prime is 550005569. The reversal of 550005555 is 555500055.

It is not a de Polignac number, because 550005555 - 2² = 550005551 is a prime.

It is a super-2 number, since 2×550005555² = 605012221061716050, which contains 22 as substring.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (550005551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138457 + ... + 142373.

It is an arithmetic number, because the mean of its divisors is an integer number (16079472).

Almost surely, 2^550005555 is an apocalyptic number.

550005555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

550005555 is a deficient number, since it is larger than the sum of its proper divisors (479080653).

550005555 is a wasteful number, since it uses less digits than its factorization.

550005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3996.

The product of its (nonzero) digits is 15625, while the sum is 30.

The square root of 550005555 is about 23452.1972318160. The cubic root of 550005555 is about 819.3240289730.

The spelling of 550005555 in words is "five hundred fifty million, five thousand, five hundred fifty-five".