216343444 has 12 divisors (see below), whose sum is σ = 386656704. Its totient is φ = 105870104.

The previous prime is 216343441. The next prime is 216343453. The reversal of 216343444 is 444343612.

It is a super-2 number, since 2×216343444² = 93608971523562272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216343441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575194 + ... + 575569.

It is an arithmetic number, because the mean of its divisors is an integer number (32221392).

Almost surely, 2^216343444 is an apocalyptic number.

It is an amenable number.

216343444 is a deficient number, since it is larger than the sum of its proper divisors (170313260).

216343444 is a wasteful number, since it uses less digits than its factorization.

216343444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150814 (or 1150812 counting only the distinct ones).

The product of its digits is 27648, while the sum is 31.

The square root of 216343444 is about 14708.6180180192. The cubic root of 216343444 is about 600.3178353085.

The spelling of 216343444 in words is "two hundred sixteen million, three hundred forty-three thousand, four hundred forty-four".