221984508050 has 54 divisors (see below), whose sum is σ = 431772529503. Its totient is φ = 84903885440.

The previous prime is 221984508041. The next prime is 221984508089. The reversal of 221984508050 is 50805489122.

It can be written as a sum of positive squares in 5 ways, for example, as 8879481361 + 213105026689 = 94231^2 + 461633^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=333155.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221984507992 and 221984508010.

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, 76624202 + ... + 76627098.

Almost surely, 2^221984508050 is an apocalyptic number.

221984508050 is a deficient number, since it is larger than the sum of its proper divisors (209788021453).

221984508050 is an frugal number, since it uses more digits than its factorization.

221984508050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852 (or 2927 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 44.

The spelling of 221984508050 in words is "two hundred twenty-one billion, nine hundred eighty-four million, five hundred eight thousand, fifty".