216500324 has 6 divisors (see below), whose sum is σ = 378875574. Its totient is φ = 108250160.

The previous prime is 216500279. The next prime is 216500353. The reversal of 216500324 is 423005612.

It can be written as a sum of positive squares in only one way, i.e., 205062400 + 11437924 = 14320^2 + 3382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216500324.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 27062537 + ... + 27062544.

It is an arithmetic number, because the mean of its divisors is an integer number (63145929).

Almost surely, 2^216500324 is an apocalyptic number.

It is an amenable number.

216500324 is a deficient number, since it is larger than the sum of its proper divisors (162375250).

216500324 is a wasteful number, since it uses less digits than its factorization.

216500324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54125085 (or 54125083 counting only the distinct ones).

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

The square root of 216500324 is about 14713.9499795262. The cubic root of 216500324 is about 600.4629057349.

Adding to 216500324 its reverse (423005612), we get a palindrome (639505936).

The spelling of 216500324 in words is "two hundred sixteen million, five hundred thousand, three hundred twenty-four".