216540230 has 16 divisors (see below), whose sum is σ = 390091680. Its totient is φ = 86545152.

The previous prime is 216540223. The next prime is 216540251. The reversal of 216540230 is 32045612.

It is a junction number, because it is equal to n+sod(n) for n = 216540196 and 216540205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4982 + ... + 21398.

It is an arithmetic number, because the mean of its divisors is an integer number (24380730).

Almost surely, 2^216540230 is an apocalyptic number.

216540230 is a deficient number, since it is larger than the sum of its proper divisors (173551450).

216540230 is a wasteful number, since it uses less digits than its factorization.

216540230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17743.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 216540230 is about 14715.3059771110. The cubic root of 216540230 is about 600.4997965198.

Adding to 216540230 its reverse (32045612), we get a palindrome (248585842).

The spelling of 216540230 in words is "two hundred sixteen million, five hundred forty thousand, two hundred thirty".