221105450 has 48 divisors (see below), whose sum is σ = 421312320. Its totient is φ = 86304000.

The previous prime is 221105449. The next prime is 221105461. The reversal of 221105450 is 54501122.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 710795 + ... + 711105.

It is an arithmetic number, because the mean of its divisors is an integer number (8777340).

Almost surely, 2^221105450 is an apocalyptic number.

221105450 is a deficient number, since it is larger than the sum of its proper divisors (200206870).

221105450 is a wasteful number, since it uses less digits than its factorization.

221105450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 221105450 is about 14869.6149916533. The cubic root of 221105450 is about 604.6905049071.

Adding to 221105450 its reverse (54501122), we get a palindrome (275606572).

The spelling of 221105450 in words is "two hundred twenty-one million, one hundred five thousand, four hundred fifty".