221696968 has 16 divisors (see below), whose sum is σ = 416309580. Its totient is φ = 110681088.

The previous prime is 221696957. The next prime is 221696987. The reversal of 221696968 is 869696122.

It can be written as a sum of positive squares in 2 ways, for example, as 211469764 + 10227204 = 14542^2 + 3198^2 .

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, 15205 + ... + 25972.

Almost surely, 2^221696968 is an apocalyptic number.

It is an amenable number.

221696968 is a deficient number, since it is larger than the sum of its proper divisors (194612612).

221696968 is a wasteful number, since it uses less digits than its factorization.

221696968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41856 (or 41852 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 221696968 is about 14889.4918650705. The cubic root of 221696968 is about 605.2292626543.

The spelling of 221696968 in words is "two hundred twenty-one million, six hundred ninety-six thousand, nine hundred sixty-eight".