221064338 has 24 divisors (see below), whose sum is σ = 366411276. Its totient is φ = 99952160.

The previous prime is 221064301. The next prime is 221064377. The reversal of 221064338 is 833460122.

It can be written as a sum of positive squares in 2 ways, for example, as 213072409 + 7991929 = 14597^2 + 2827^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221064338.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45356 + ... + 49992.

Almost surely, 2^221064338 is an apocalyptic number.

221064338 is a deficient number, since it is larger than the sum of its proper divisors (145346938).

221064338 is a wasteful number, since it uses less digits than its factorization.

221064338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858 (or 4847 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 221064338 is about 14868.2325109611. The cubic root of 221064338 is about 604.6530241831.

The spelling of 221064338 in words is "two hundred twenty-one million, sixty-four thousand, three hundred thirty-eight".