216322344 has 48 divisors (see below), whose sum is σ = 669570720. Its totient is φ = 61806240.

The previous prime is 216322289. The next prime is 216322349. The reversal of 216322344 is 443223612.

216322344 is a `hidden beast` number, since 2 + 1 + 632 + 23 + 4 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (216322349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214102 + ... + 215109.

It is an arithmetic number, because the mean of its divisors is an integer number (13949390).

Almost surely, 2^216322344 is an apocalyptic number.

216322344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216322344 is an abundant number, since it is smaller than the sum of its proper divisors (453248376).

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

216322344 is a wasteful number, since it uses less digits than its factorization.

216322344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429230 (or 429223 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 216322344 is about 14707.9007339593. The cubic root of 216322344 is about 600.2983183191.

Adding to 216322344 its reverse (443223612), we get a palindrome (659545956).

The spelling of 216322344 in words is "two hundred sixteen million, three hundred twenty-two thousand, three hundred forty-four".