221482028 has 6 divisors (see below), whose sum is σ = 387593556. Its totient is φ = 110741012.

The previous prime is 221482013. The next prime is 221482049. The reversal of 221482028 is 820284122.

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, 27685250 + ... + 27685257.

It is an arithmetic number, because the mean of its divisors is an integer number (64598926).

Almost surely, 2^221482028 is an apocalyptic number.

It is an amenable number.

221482028 is a deficient number, since it is larger than the sum of its proper divisors (166111528).

221482028 is a wasteful number, since it uses less digits than its factorization.

221482028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55370511 (or 55370509 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 221482028 is about 14882.2722727411. The cubic root of 221482028 is about 605.0336051274.

The spelling of 221482028 in words is "two hundred twenty-one million, four hundred eighty-two thousand, twenty-eight".