221850212 has 24 divisors (see below), whose sum is σ = 395437056. Its totient is φ = 108883008.

The previous prime is 221850197. The next prime is 221850247. The reversal of 221850212 is 212058122.

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 7 ways as a sum of consecutive naturals, for example, 63413 + ... + 66819.

It is an arithmetic number, because the mean of its divisors is an integer number (16476544).

Almost surely, 2^221850212 is an apocalyptic number.

It is an amenable number.

221850212 is a deficient number, since it is larger than the sum of its proper divisors (173586844).

221850212 is a wasteful number, since it uses less digits than its factorization.

221850212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707 (or 3705 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 221850212 is about 14894.6370214249. The cubic root of 221850212 is about 605.3686817783.

The spelling of 221850212 in words is "two hundred twenty-one million, eight hundred fifty thousand, two hundred twelve".