221030648 has 16 divisors (see below), whose sum is σ = 436245000. Its totient is φ = 104698656.

The previous prime is 221030647. The next prime is 221030657. The reversal of 221030648 is 846030122.

221030648 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221030647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726923 + ... + 727226.

Almost surely, 2^221030648 is an apocalyptic number.

It is an amenable number.

221030648 is a deficient number, since it is larger than the sum of its proper divisors (215214352).

221030648 is a wasteful number, since it uses less digits than its factorization.

221030648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454174 (or 1454170 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 221030648 is about 14867.0995153729. The cubic root of 221030648 is about 604.6223064360.

The spelling of 221030648 in words is "two hundred twenty-one million, thirty thousand, six hundred forty-eight".