2211555555 has 80 divisors (see below), whose sum is σ = 4338157824. Its totient is φ = 1068966720.

The previous prime is 2211555553. The next prime is 2211555583. The reversal of 2211555555 is 5555551122.

It is not a de Polignac number, because 2211555555 - 2¹ = 2211555553 is a prime.

2211555555 is a modest number, since divided by 55555 gives 22115 as remainder.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2211555553) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2079954 + ... + 2081016.

Almost surely, 2^2211555555 is an apocalyptic number.

2211555555 is a deficient number, since it is larger than the sum of its proper divisors (2126602269).

2211555555 is a wasteful number, since it uses less digits than its factorization.

2211555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558 (or 1549 counting only the distinct ones).

The product of its digits is 62500, while the sum is 36.

The square root of 2211555555 is about 47027.1788968890. The cubic root of 2211555555 is about 1302.8646012477.

The spelling of 2211555555 in words is "two billion, two hundred eleven million, five hundred fifty-five thousand, five hundred fifty-five".