221983136 has 12 divisors (see below), whose sum is σ = 437029362. Its totient is φ = 110991552.

The previous prime is 221983129. The next prime is 221983141. The reversal of 221983136 is 631389122.

It can be written as a sum of positive squares in only one way, i.e., 217739536 + 4243600 = 14756^2 + 2060^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221983096 and 221983105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3468455 + ... + 3468518.

Almost surely, 2^221983136 is an apocalyptic number.

It is an amenable number.

221983136 is a deficient number, since it is larger than the sum of its proper divisors (215046226).

221983136 is an equidigital number, since it uses as much as digits as its factorization.

221983136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936983 (or 6936975 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 221983136 is about 14899.0984962178. The cubic root of 221983136 is about 605.4895620789.

The spelling of 221983136 in words is "two hundred twenty-one million, nine hundred eighty-three thousand, one hundred thirty-six".