2215218688 has 80 divisors (see below), whose sum is σ = 4641015456. Its totient is φ = 1054310400.

The previous prime is 2215218559. The next prime is 2215218689. The reversal of 2215218688 is 8868125122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215218689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3685588 + ... + 3686188.

Almost surely, 2^2215218688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2215218688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2320507728).

2215218688 is an abundant number, since it is smaller than the sum of its proper divisors (2425796768).

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

2215218688 is an equidigital number, since it uses as much as digits as its factorization.

2215218688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 939 counting only the distinct ones).

The product of its digits is 122880, while the sum is 43.

The square root of 2215218688 is about 47066.1097606335. The cubic root of 2215218688 is about 1303.5835422207.

The spelling of 2215218688 in words is "two billion, two hundred fifteen million, two hundred eighteen thousand, six hundred eighty-eight".