4391221522730 has 32 divisors (see below), whose sum is σ = 9217724486400. Its totient is φ = 1505561663760.

The previous prime is 4391221522711. The next prime is 4391221522747. The reversal of 4391221522730 is 372251221934.

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, 640116326 + ... + 640123185.

It is an arithmetic number, because the mean of its divisors is an integer number (288053890200).

Almost surely, 2^{4391221522730} is an apocalyptic number.

4391221522730 is an abundant number, since it is smaller than the sum of its proper divisors (4826502963670).

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

4391221522730 is a wasteful number, since it uses less digits than its factorization.

4391221522730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280239539 (or 1280239525 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 4391221522730 in words is "four trillion, three hundred ninety-one billion, two hundred twenty-one million, five hundred twenty-two thousand, seven hundred thirty".