216442367 has 4 divisors (see below), whose sum is σ = 216589800. Its totient is φ = 216294936.

The previous prime is 216442333. The next prime is 216442381. The reversal of 216442367 is 763244612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216442367 - 2²² = 212248063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216442307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71492 + ... + 74457.

It is an arithmetic number, because the mean of its divisors is an integer number (54147450).

Almost surely, 2^216442367 is an apocalyptic number.

216442367 is a deficient number, since it is larger than the sum of its proper divisors (147433).

216442367 is a wasteful number, since it uses less digits than its factorization.

216442367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147432.

The product of its digits is 48384, while the sum is 35.

The square root of 216442367 is about 14711.9803901446. The cubic root of 216442367 is about 600.4093197728.

Adding to 216442367 its reverse (763244612), we get a palindrome (979686979).

The spelling of 216442367 in words is "two hundred sixteen million, four hundred forty-two thousand, three hundred sixty-seven".