216222612 has 12 divisors (see below), whose sum is σ = 504519456. Its totient is φ = 72074200.

The previous prime is 216222593. The next prime is 216222649.

It is a happy number.

216222612 is nontrivially palindromic in base 10.

216222612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

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, 9009264 + ... + 9009287.

It is an arithmetic number, because the mean of its divisors is an integer number (42043288).

Almost surely, 2^216222612 is an apocalyptic number.

It is an amenable number.

216222612 is an abundant number, since it is smaller than the sum of its proper divisors (288296844).

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

216222612 is a wasteful number, since it uses less digits than its factorization.

216222612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18018558 (or 18018556 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 216222612 is about 14704.5099204292. The cubic root of 216222612 is about 600.2060514521.

The spelling of 216222612 in words is "two hundred sixteen million, two hundred twenty-two thousand, six hundred twelve".