2218505000 has 40 divisors (see below), whose sum is σ = 5197968930. Its totient is φ = 887400000.

The previous prime is 2218504991. The next prime is 2218505021. The reversal of 2218505000 is 5058122.

It can be written as a sum of positive squares in 5 ways, for example, as 162970756 + 2055534244 = 12766^2 + 45338^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 216851 + ... + 226850.

Almost surely, 2^2218505000 is an apocalyptic number.

2218505000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218505000 is an abundant number, since it is smaller than the sum of its proper divisors (2979463930).

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

2218505000 is an equidigital number, since it uses as much as digits as its factorization.

2218505000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443727 (or 443708 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 2218505000 is about 47101.0084817724. The cubic root of 2218505000 is about 1304.2278526528.

The spelling of 2218505000 in words is "two billion, two hundred eighteen million, five hundred five thousand".