216324642 has 16 divisors (see below), whose sum is σ = 439107552. Its totient is φ = 71031840.

The previous prime is 216324631. The next prime is 216324649. The reversal of 216324642 is 246423612.

It is not an unprimeable number, because it can be changed into a prime (216324649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268659 + ... + 269462.

It is an arithmetic number, because the mean of its divisors is an integer number (27444222).

Almost surely, 2^216324642 is an apocalyptic number.

216324642 is an abundant number, since it is smaller than the sum of its proper divisors (222782910).

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

216324642 is a wasteful number, since it uses less digits than its factorization.

216324642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538193.

The product of its digits is 13824, while the sum is 30.

The square root of 216324642 is about 14707.9788550297. The cubic root of 216324642 is about 600.3004439750.

The spelling of 216324642 in words is "two hundred sixteen million, three hundred twenty-four thousand, six hundred forty-two".