216365212 has 12 divisors (see below), whose sum is σ = 432730480. Its totient is φ = 92727936.

The previous prime is 216365203. The next prime is 216365249. The reversal of 216365212 is 212563612.

216365212 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 7727329 = 216365212 / (2 + 1 + 6 + 3 + 6 + 5 + 2 + 1 + 2).

It is an alternating number because its digits alternate between even and odd.

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, 3863637 + ... + 3863692.

Almost surely, 2^216365212 is an apocalyptic number.

It is an amenable number.

216365212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216365212 is a wasteful number, since it uses less digits than its factorization.

216365212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7727340 (or 7727338 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 216365212 is about 14709.3579737526. The cubic root of 216365212 is about 600.3379688519.

The spelling of 216365212 in words is "two hundred sixteen million, three hundred sixty-five thousand, two hundred twelve".