221331244 has 6 divisors (see below), whose sum is σ = 387329684. Its totient is φ = 110665620.

The previous prime is 221331199. The next prime is 221331251. The reversal of 221331244 is 442133122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27666402 + ... + 27666409.

Almost surely, 2^221331244 is an apocalyptic number.

It is an amenable number.

221331244 is a deficient number, since it is larger than the sum of its proper divisors (165998440).

221331244 is a wasteful number, since it uses less digits than its factorization.

221331244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55332815 (or 55332813 counting only the distinct ones).

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

The square root of 221331244 is about 14877.2055171662. The cubic root of 221331244 is about 604.8962725432.

Adding to 221331244 its reverse (442133122), we get a palindrome (663464366).

The spelling of 221331244 in words is "two hundred twenty-one million, three hundred thirty-one thousand, two hundred forty-four".