216438422 has 8 divisors (see below), whose sum is σ = 324753456. Its totient is φ = 108187272.

The previous prime is 216438401. The next prime is 216438427. The reversal of 216438422 is 224834612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216438427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6338 + ... + 21749.

It is an arithmetic number, because the mean of its divisors is an integer number (40594182).

Almost surely, 2^216438422 is an apocalyptic number.

216438422 is a deficient number, since it is larger than the sum of its proper divisors (108315034).

216438422 is a wasteful number, since it uses less digits than its factorization.

216438422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31942.

The product of its digits is 18432, while the sum is 32.

The square root of 216438422 is about 14711.8463151299. The cubic root of 216438422 is about 600.4056719516.

The spelling of 216438422 in words is "two hundred sixteen million, four hundred thirty-eight thousand, four hundred twenty-two".