221455106 has 16 divisors (see below), whose sum is σ = 337426560. Its totient is φ = 108984960.

The previous prime is 221455099. The next prime is 221455111. The reversal of 221455106 is 601554122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129650 + ... + 131346.

It is an arithmetic number, because the mean of its divisors is an integer number (21089160).

Almost surely, 2^221455106 is an apocalyptic number.

221455106 is a deficient number, since it is larger than the sum of its proper divisors (115971454).

221455106 is a wasteful number, since it uses less digits than its factorization.

221455106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 221455106 is about 14881.3677462792. The cubic root of 221455106 is about 605.0090894065.

The spelling of 221455106 in words is "two hundred twenty-one million, four hundred fifty-five thousand, one hundred six".