221683438082 has 10 divisors (see below), whose sum is σ = 333102457743. Its totient is φ = 110649619008.

The previous prime is 221683438069. The next prime is 221683438091. The reversal of 221683438082 is 280834386122.

It can be written as a sum of positive squares in 3 ways, for example, as 147088357441 + 74595080641 = 383521^2 + 273121^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332929.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 4 ways as a sum of consecutive naturals, for example, 384199778 + ... + 384200354.

Almost surely, 2^221683438082 is an apocalyptic number.

221683438082 is a deficient number, since it is larger than the sum of its proper divisors (111419019661).

221683438082 is an frugal number, since it uses more digits than its factorization.

221683438082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 47.

The spelling of 221683438082 in words is "two hundred twenty-one billion, six hundred eighty-three million, four hundred thirty-eight thousand, eighty-two".