221672784482 has 6 divisors (see below), whose sum is σ = 332510175489. Its totient is φ = 110836059320.

The previous prime is 221672784467. The next prime is 221672784491. The reversal of 221672784482 is 284487276122.

It can be written as a sum of positive squares in 2 ways, for example, as 202463101681 + 19209682801 = 449959^2 + 138599^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332921.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 499382 + ... + 832302.

Almost surely, 2^221672784482 is an apocalyptic number.

221672784482 is a deficient number, since it is larger than the sum of its proper divisors (110837391007).

221672784482 is an frugal number, since it uses more digits than its factorization.

221672784482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665844 (or 332923 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 53.

The spelling of 221672784482 in words is "two hundred twenty-one billion, six hundred seventy-two million, seven hundred eighty-four thousand, four hundred eighty-two".