216323444 has 12 divisors (see below), whose sum is σ = 381456768. Its totient is φ = 107335800.

The previous prime is 216323413. The next prime is 216323447. The reversal of 216323444 is 444323612.

It is a super-3 number, since 3×216323444³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216323447) 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, 205892 + ... + 206939.

It is an arithmetic number, because the mean of its divisors is an integer number (31788064).

Almost surely, 2^216323444 is an apocalyptic number.

It is an amenable number.

216323444 is a deficient number, since it is larger than the sum of its proper divisors (165133324).

216323444 is a wasteful number, since it uses less digits than its factorization.

216323444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412966 (or 412964 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 216323444 is about 14707.9381287793. The cubic root of 216323444 is about 600.2993358238.

The spelling of 216323444 in words is "two hundred sixteen million, three hundred twenty-three thousand, four hundred forty-four".