221441332 has 96 divisors (see below), whose sum is σ = 487710720. Its totient is φ = 85895040.

The previous prime is 221441237. The next prime is 221441377. The reversal of 221441332 is 233144122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1325913 + ... + 1326079.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^221441332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221441332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243855360).

221441332 is an abundant number, since it is smaller than the sum of its proper divisors (266269388).

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

221441332 is a wasteful number, since it uses less digits than its factorization.

221441332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 299 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 221441332 is about 14880.9049456006. The cubic root of 221441332 is about 604.9965457536.

Adding to 221441332 its reverse (233144122), we get a palindrome (454585454).

The spelling of 221441332 in words is "two hundred twenty-one million, four hundred forty-one thousand, three hundred thirty-two".