2215668 has 48 divisors (see below), whose sum is σ = 6366080. Its totient is φ = 584064.

The previous prime is 2215667. The next prime is 2215669. The reversal of 2215668 is 8665122.

It is an interprime number because it is at equal distance from previous prime (2215667) and next prime (2215669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78 + ... + 2106.

2^2215668 is an apocalyptic number.

2215668 is a gapful number since it is divisible by the number (28) 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 2215668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3183040).

2215668 is an abundant number, since it is smaller than the sum of its proper divisors (4150412).

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

2215668 is a wasteful number, since it uses less digits than its factorization.

2215668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056 (or 2054 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 2215668 is about 1488.5120086852. The cubic root of 2215668 is about 130.3671671388.

The spelling of 2215668 in words is "two million, two hundred fifteen thousand, six hundred sixty-eight".