221886748 has 6 divisors (see below), whose sum is σ = 388301816. Its totient is φ = 110943372.

The previous prime is 221886719. The next prime is 221886811. The reversal of 221886748 is 847688122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221886698 and 221886707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27735840 + ... + 27735847.

Almost surely, 2^221886748 is an apocalyptic number.

It is an amenable number.

221886748 is a deficient number, since it is larger than the sum of its proper divisors (166415068).

221886748 is a wasteful number, since it uses less digits than its factorization.

221886748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55471691 (or 55471689 counting only the distinct ones).

The product of its digits is 344064, while the sum is 46.

The square root of 221886748 is about 14895.8634526502. The cubic root of 221886748 is about 605.4019122117.

The spelling of 221886748 in words is "two hundred twenty-one million, eight hundred eighty-six thousand, seven hundred forty-eight".