221839116004 has 81 divisors (see below), whose sum is σ = 433790021763. Its totient is φ = 99192178800.

The previous prime is 221839115999. The next prime is 221839116049. The reversal of 221839116004 is 400611938122.

The square root of 221839116004 is 470998.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 818594389 + ... + 818594659.

Almost surely, 2^221839116004 is an apocalyptic number.

221839116004 is the 470998-th square number.

It is an amenable number.

221839116004 is a deficient number, since it is larger than the sum of its proper divisors (211950905759).

221839116004 is an equidigital number, since it uses as much as digits as its factorization.

221839116004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 221839116004 in words is "two hundred twenty-one billion, eight hundred thirty-nine million, one hundred sixteen thousand, four".