216740324 has 12 divisors (see below), whose sum is σ = 380077824. Its totient is φ = 108146664.

The previous prime is 216740311. The next prime is 216740341. The reversal of 216740324 is 423047612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53684 + ... + 57579.

It is an arithmetic number, because the mean of its divisors is an integer number (31673152).

Almost surely, 2^216740324 is an apocalyptic number.

It is an amenable number.

216740324 is a deficient number, since it is larger than the sum of its proper divisors (163337500).

216740324 is a wasteful number, since it uses less digits than its factorization.

216740324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111754 (or 111752 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 216740324 is about 14722.1032464794. The cubic root of 216740324 is about 600.6847035231.

Adding to 216740324 its reverse (423047612), we get a palindrome (639787936).

The spelling of 216740324 in words is "two hundred sixteen million, seven hundred forty thousand, three hundred twenty-four".