221455066 has 8 divisors (see below), whose sum is σ = 379637280. Its totient is φ = 94909308.

The previous prime is 221455043. The next prime is 221455097. The reversal of 221455066 is 660554122.

221455066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 7909096 + ... + 7909123.

It is an arithmetic number, because the mean of its divisors is an integer number (47454660).

Almost surely, 2^221455066 is an apocalyptic number.

221455066 is a deficient number, since it is larger than the sum of its proper divisors (158182214).

221455066 is a wasteful number, since it uses less digits than its factorization.

221455066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15818228.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 221455066 is about 14881.3664023167. The cubic root of 221455066 is about 605.0090529802.

The spelling of 221455066 in words is "two hundred twenty-one million, four hundred fifty-five thousand, sixty-six".