216343225 has 24 divisors (see below), whose sum is σ = 308962368. Its totient is φ = 147201600.

The previous prime is 216343223. The next prime is 216343243. The reversal of 216343225 is 522343612.

216343225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216343225 - 2¹ = 216343223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216343193 and 216343202.

It is not an unprimeable number, because it can be changed into a prime (216343223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18207 + ... + 27643.

It is an arithmetic number, because the mean of its divisors is an integer number (12873432).

Almost surely, 2^216343225 is an apocalyptic number.

216343225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216343225 is a deficient number, since it is larger than the sum of its proper divisors (92619143).

216343225 is a wasteful number, since it uses less digits than its factorization.

216343225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9585 (or 9580 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 216343225 is about 14708.6105734022. The cubic root of 216343225 is about 600.3176327453.

Adding to 216343225 its reverse (522343612), we get a palindrome (738686837).

The spelling of 216343225 in words is "two hundred sixteen million, three hundred forty-three thousand, two hundred twenty-five".