221332132 has 12 divisors (see below), whose sum is σ = 442664320. Its totient is φ = 94856616.

The previous prime is 221332127. The next prime is 221332193. The reversal of 221332132 is 231233122.

221332132 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3952332 + ... + 3952387.

Almost surely, 2^221332132 is an apocalyptic number.

It is an amenable number.

221332132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221332132 is a wasteful number, since it uses less digits than its factorization.

221332132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7904730 (or 7904728 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 221332132 is about 14877.2353614507. The cubic root of 221332132 is about 604.8970815074.

Adding to 221332132 its reverse (231233122), we get a palindrome (452565254).

The spelling of 221332132 in words is "two hundred twenty-one million, three hundred thirty-two thousand, one hundred thirty-two".