2218320000 has 640 divisors, whose sum is σ = 8922144000. Its totient is φ = 539136000.

The previous prime is 2218319993. The next prime is 2218320017. The reversal of 2218320000 is 238122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 28079961 + ... + 28080039.

It is an arithmetic number, because the mean of its divisors is an integer number (13940850).

Almost surely, 2^2218320000 is an apocalyptic number.

2218320000 is a gapful number since it is divisible by the number (20) 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 2218320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4461072000).

2218320000 is an abundant number, since it is smaller than the sum of its proper divisors (6703824000).

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

2218320000 is an equidigital number, since it uses as much as digits as its factorization.

2218320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2218320000 is about 47099.0445762969. The cubic root of 2218320000 is about 1304.1915986800.

Adding to 2218320000 its reverse (238122), we get a palindrome (2218558122).

The spelling of 2218320000 in words is "two billion, two hundred eighteen million, three hundred twenty thousand".