221330272 has 12 divisors (see below), whose sum is σ = 435744036. Its totient is φ = 110665120.

The previous prime is 221330269. The next prime is 221330281. The reversal of 221330272 is 272033122.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3458254 + ... + 3458317.

It is an arithmetic number, because the mean of its divisors is an integer number (36312003).

Almost surely, 2^221330272 is an apocalyptic number.

It is an amenable number.

221330272 is a deficient number, since it is larger than the sum of its proper divisors (214413764).

221330272 is an equidigital number, since it uses as much as digits as its factorization.

221330272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916581 (or 6916573 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 221330272 is about 14877.1728497050. The cubic root of 221330272 is about 604.8953870528.

Adding to 221330272 its reverse (272033122), we get a palindrome (493363394).

The spelling of 221330272 in words is "two hundred twenty-one million, three hundred thirty thousand, two hundred seventy-two".