221163266 has 8 divisors (see below), whose sum is σ = 339836364. Its totient is φ = 107884480.

The previous prime is 221163259. The next prime is 221163311. The reversal of 221163266 is 662361122.

221163266 is digitally balanced in base 2, 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 214007641 + 7155625 = 14629^2 + 2675^2 .

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, 1348475 + ... + 1348638.

Almost surely, 2^221163266 is an apocalyptic number.

221163266 is a deficient number, since it is larger than the sum of its proper divisors (118673098).

221163266 is a wasteful number, since it uses less digits than its factorization.

221163266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697156.

The product of its digits is 5184, while the sum is 29.

The square root of 221163266 is about 14871.5589633367. The cubic root of 221163266 is about 604.7432063661.

The spelling of 221163266 in words is "two hundred twenty-one million, one hundred sixty-three thousand, two hundred sixty-six".