221704432 has 10 divisors (see below), whose sum is σ = 429552368. Its totient is φ = 110852208.

The previous prime is 221704403. The next prime is 221704433. The reversal of 221704432 is 234407122.

It is a happy number.

221704432 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221704397 and 221704406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221704433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928248 + ... + 6928279.

Almost surely, 2^221704432 is an apocalyptic number.

It is an amenable number.

221704432 is a deficient number, since it is larger than the sum of its proper divisors (207847936).

221704432 is a wasteful number, since it uses less digits than its factorization.

221704432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13856535 (or 13856529 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 221704432 is about 14889.7425095265. The cubic root of 221704432 is about 605.2360547792.

The spelling of 221704432 in words is "two hundred twenty-one million, seven hundred four thousand, four hundred thirty-two".