221132432 has 20 divisors (see below), whose sum is σ = 429006396. Its totient is φ = 110421120.

The previous prime is 221132423. The next prime is 221132437. The reversal of 221132432 is 234231122.

It can be written as a sum of positive squares in 2 ways, for example, as 158659216 + 62473216 = 12596^2 + 7904^2 .

It is not an unprimeable number, because it can be changed into a prime (221132437) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4082 + ... + 21422.

Almost surely, 2^221132432 is an apocalyptic number.

It is an amenable number.

221132432 is a deficient number, since it is larger than the sum of its proper divisors (207873964).

221132432 is a wasteful number, since it uses less digits than its factorization.

221132432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18146 (or 18140 counting only the distinct ones).

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

The square root of 221132432 is about 14870.5222504121. The cubic root of 221132432 is about 604.7151011583.

Adding to 221132432 its reverse (234231122), we get a palindrome (455363554).

It can be divided in two parts, 2211 and 32432, that added together give a palindrome (34643).

The spelling of 221132432 in words is "two hundred twenty-one million, one hundred thirty-two thousand, four hundred thirty-two".