2221215543424 has 128 divisors (see below), whose sum is σ = 4731839078400. Its totient is φ = 1036779110400.

The previous prime is 2221215543401. The next prime is 2221215543523. The reversal of 2221215543424 is 4243455121222.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14402529 + ... + 14555935.

It is an arithmetic number, because the mean of its divisors is an integer number (36967492800).

Almost surely, 2^{2221215543424} 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 2221215543424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365919539200).

2221215543424 is an abundant number, since it is smaller than the sum of its proper divisors (2510623534976).

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

2221215543424 is a wasteful number, since it uses less digits than its factorization.

2221215543424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153582 (or 153570 counting only the distinct ones).

The product of its digits is 153600, while the sum is 37.

The spelling of 2221215543424 in words is "two trillion, two hundred twenty-one billion, two hundred fifteen million, five hundred forty-three thousand, four hundred twenty-four".