2211199988 has 12 divisors (see below), whose sum is σ = 3874460772. Its totient is φ = 1104211200.

The previous prime is 2211199981. The next prime is 2211199997. The reversal of 2211199988 is 8899911122.

It can be written as a sum of positive squares in 2 ways, for example, as 969201424 + 1241998564 = 31132^2 + 35242^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211199981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343613 + ... + 349988.

It is an arithmetic number, because the mean of its divisors is an integer number (322871731).

Almost surely, 2^2211199988 is an apocalyptic number.

It is an amenable number.

2211199988 is a deficient number, since it is larger than the sum of its proper divisors (1663260784).

2211199988 is a wasteful number, since it uses less digits than its factorization.

2211199988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694402 (or 694400 counting only the distinct ones).

The product of its digits is 186624, while the sum is 50.

The square root of 2211199988 is about 47023.3983033979. The cubic root of 2211199988 is about 1302.7947740039.

The spelling of 2211199988 in words is "two billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred eighty-eight".