221001232 has 20 divisors (see below), whose sum is σ = 442003456. Its totient is φ = 106935840.

The previous prime is 221001223. The next prime is 221001247. The reversal of 221001232 is 232100122.

221001232 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, 222288 + ... + 223279.

Almost surely, 2^221001232 is an apocalyptic number.

It is an amenable number.

221001232 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.

221001232 is a wasteful number, since it uses less digits than its factorization.

221001232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445606 (or 445600 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 221001232 is about 14866.1101839049. The cubic root of 221001232 is about 604.5954830686.

Adding to 221001232 its reverse (232100122), we get a palindrome (453101354).

It can be divided in two parts, 22100 and 1232, that added together give a palindrome (23332).

The spelling of 221001232 in words is "two hundred twenty-one million, one thousand, two hundred thirty-two".