216687222 has 12 divisors (see below), whose sum is σ = 469489020. Its totient is φ = 72229068.

The previous prime is 216687221. The next prime is 216687269. The reversal of 216687222 is 222786612.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216687221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6019072 + ... + 6019107.

It is an arithmetic number, because the mean of its divisors is an integer number (39124085).

Almost surely, 2^216687222 is an apocalyptic number.

216687222 is an abundant number, since it is smaller than the sum of its proper divisors (252801798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216687222 is a wasteful number, since it uses less digits than its factorization.

216687222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12038187 (or 12038184 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 216687222 is about 14720.2996572760. The cubic root of 216687222 is about 600.6356430254.

The spelling of 216687222 in words is "two hundred sixteen million, six hundred eighty-seven thousand, two hundred twenty-two".