221131132 has 6 divisors (see below), whose sum is σ = 386979488. Its totient is φ = 110565564.

The previous prime is 221131111. The next prime is 221131147. The reversal of 221131132 is 231131122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27641388 + ... + 27641395.

Almost surely, 2^221131132 is an apocalyptic number.

It is an amenable number.

221131132 is a deficient number, since it is larger than the sum of its proper divisors (165848356).

221131132 is a wasteful number, since it uses less digits than its factorization.

221131132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55282787 (or 55282785 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 221131132 is about 14870.4785397108. The cubic root of 221131132 is about 604.7139161502.

Adding to 221131132 its reverse (231131122), we get a palindrome (452262254).

The spelling of 221131132 in words is "two hundred twenty-one million, one hundred thirty-one thousand, one hundred thirty-two".