216423326 has 16 divisors (see below), whose sum is σ = 371384160. Its totient is φ = 92659680.

The previous prime is 216423313. The next prime is 216423349. The reversal of 216423326 is 623324612.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7736 + ... + 22196.

It is an arithmetic number, because the mean of its divisors is an integer number (23211510).

Almost surely, 2^216423326 is an apocalyptic number.

216423326 is a deficient number, since it is larger than the sum of its proper divisors (154960834).

216423326 is a wasteful number, since it uses less digits than its factorization.

216423326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15539.

The product of its digits is 10368, while the sum is 29.

The square root of 216423326 is about 14711.3332502530. Note that the first 3 decimals coincide. The cubic root of 216423326 is about 600.3917127314.

Adding to 216423326 its reverse (623324612), we get a palindrome (839747938).

The spelling of 216423326 in words is "two hundred sixteen million, four hundred twenty-three thousand, three hundred twenty-six".