216331322 has 8 divisors (see below), whose sum is σ = 324648756. Its totient is φ = 108115072.

The previous prime is 216331303. The next prime is 216331327. The reversal of 216331322 is 223133612.

It can be written as a sum of positive squares in 2 ways, for example, as 213130801 + 3200521 = 14599^2 + 1789^2 .

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

It is not an unprimeable number, because it can be changed into a prime (216331327) 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, 19703 + ... + 28650.

Almost surely, 2^216331322 is an apocalyptic number.

216331322 is a deficient number, since it is larger than the sum of its proper divisors (108317434).

216331322 is a wasteful number, since it uses less digits than its factorization.

216331322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50592.

The product of its digits is 1296, while the sum is 23.

The square root of 216331322 is about 14708.2059409025. The cubic root of 216331322 is about 600.3066229069.

Adding to 216331322 its reverse (223133612), we get a palindrome (439464934).

The spelling of 216331322 in words is "two hundred sixteen million, three hundred thirty-one thousand, three hundred twenty-two".