221230568 has 32 divisors (see below), whose sum is σ = 448731360. Its totient is φ = 101645760.

The previous prime is 221230561. The next prime is 221230577. The reversal of 221230568 is 865032122.

It is a self number, because there is not a number n which added to its sum of digits gives 221230568.

It is not an unprimeable number, because it can be changed into a prime (221230561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18923 + ... + 28293.

It is an arithmetic number, because the mean of its divisors is an integer number (14022855).

Almost surely, 2^221230568 is an apocalyptic number.

It is an amenable number.

221230568 is an abundant number, since it is smaller than the sum of its proper divisors (227500792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221230568 is a wasteful number, since it uses less digits than its factorization.

221230568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9617 (or 9613 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 221230568 is about 14873.8215667662. The cubic root of 221230568 is about 604.8045431034.

The spelling of 221230568 in words is "two hundred twenty-one million, two hundred thirty thousand, five hundred sixty-eight".