221716106 has 8 divisors (see below), whose sum is σ = 333296964. Its totient is φ = 110617120.

The previous prime is 221716097. The next prime is 221716129. The reversal of 221716106 is 601617122.

221716106 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 221563225 + 152881 = 14885^2 + 391^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 119315 + ... + 121158.

Almost surely, 2^221716106 is an apocalyptic number.

221716106 is a deficient number, since it is larger than the sum of its proper divisors (111580858).

221716106 is a wasteful number, since it uses less digits than its factorization.

221716106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240936.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 221716106 is about 14890.1345192043. The cubic root of 221716106 is about 605.2466776336.

The spelling of 221716106 in words is "two hundred twenty-one million, seven hundred sixteen thousand, one hundred six".