221432132 has 24 divisors (see below), whose sum is σ = 417403392. Its totient is φ = 102484800.

The previous prime is 221432117. The next prime is 221432149. The reversal of 221432132 is 231234122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35969 + ... + 41672.

It is an arithmetic number, because the mean of its divisors is an integer number (17391808).

Almost surely, 2^221432132 is an apocalyptic number.

It is an amenable number.

221432132 is a deficient number, since it is larger than the sum of its proper divisors (195971260).

221432132 is a wasteful number, since it uses less digits than its factorization.

221432132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77699 (or 77697 counting only the distinct ones).

The product of its digits is 576, while the sum is 20.

The square root of 221432132 is about 14880.5958214045. The cubic root of 221432132 is about 604.9881672435.

Adding to 221432132 its reverse (231234122), we get a palindrome (452666254).

The spelling of 221432132 in words is "two hundred twenty-one million, four hundred thirty-two thousand, one hundred thirty-two".