221999968 has 24 divisors (see below), whose sum is σ = 438064200. Its totient is φ = 110745600.

The previous prime is 221999929. The next prime is 221999983. The reversal of 221999968 is 869999122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6643 + ... + 22093.

It is an arithmetic number, because the mean of its divisors is an integer number (18252675).

Almost surely, 2^221999968 is an apocalyptic number.

It is an amenable number.

221999968 is a deficient number, since it is larger than the sum of its proper divisors (216064232).

221999968 is a wasteful number, since it uses less digits than its factorization.

221999968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15910 (or 15902 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 55.

The square root of 221999968 is about 14899.6633519016. The cubic root of 221999968 is about 605.5048655578.

The spelling of 221999968 in words is "two hundred twenty-one million, nine hundred ninety-nine thousand, nine hundred sixty-eight".