2221215340 has 24 divisors (see below), whose sum is σ = 4867359840. Its totient is φ = 849856128.

The previous prime is 2221215323. The next prime is 2221215341. The reversal of 2221215340 is 435121222.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2221215341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2413905 + ... + 2414824.

It is an arithmetic number, because the mean of its divisors is an integer number (202806660).

Almost surely, 2^2221215340 is an apocalyptic number.

2221215340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221215340 is an abundant number, since it is smaller than the sum of its proper divisors (2646144500).

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

2221215340 is a wasteful number, since it uses less digits than its factorization.

2221215340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4828761 (or 4828759 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2221215340 is about 47129.7712703977. The cubic root of 2221215340 is about 1304.7587600836.

Adding to 2221215340 its reverse (435121222), we get a palindrome (2656336562).

The spelling of 2221215340 in words is "two billion, two hundred twenty-one million, two hundred fifteen thousand, three hundred forty".