219218228 has 12 divisors (see below), whose sum is σ = 385930272. Its totient is φ = 108952440.

The previous prime is 219218203. The next prime is 219218261. The reversal of 219218228 is 822812912.

It is a congruent number.

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, 163418 + ... + 164753.

It is an arithmetic number, because the mean of its divisors is an integer number (32160856).

Almost surely, 2^219218228 is an apocalyptic number.

It is an amenable number.

219218228 is a deficient number, since it is larger than the sum of its proper divisors (166712044).

219218228 is a wasteful number, since it uses less digits than its factorization.

219218228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328342 (or 328340 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 219218228 is about 14806.0199918817. The cubic root of 219218228 is about 602.9651629494.

The spelling of 219218228 in words is "two hundred nineteen million, two hundred eighteen thousand, two hundred twenty-eight".