221598016 has 14 divisors (see below), whose sum is σ = 439733690. Its totient is φ = 110798976.

The previous prime is 221598001. The next prime is 221598059. The reversal of 221598016 is 610895122.

It can be written as a sum of positive squares in only one way, i.e., 214329600 + 7268416 = 14640^2 + 2696^2 .

It is a congruent 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 as a sum of consecutive naturals, namely, 1731171 + ... + 1731298.

Almost surely, 2^221598016 is an apocalyptic number.

It is an amenable number.

221598016 is a deficient number, since it is larger than the sum of its proper divisors (218135674).

221598016 is an equidigital number, since it uses as much as digits as its factorization.

221598016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462481 (or 3462471 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 221598016 is about 14886.1686138509. The cubic root of 221598016 is about 605.1392034487.

The spelling of 221598016 in words is "two hundred twenty-one million, five hundred ninety-eight thousand, sixteen".