216306224 has 10 divisors (see below), whose sum is σ = 419093340. Its totient is φ = 108153104.

The previous prime is 216306221. The next prime is 216306229. The reversal of 216306224 is 422603612.

It is a super-2 number, since 2×216306224² = 93576765082276352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216306193 and 216306202.

It is not an unprimeable number, because it can be changed into a prime (216306221) by changing a digit.

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 as a sum of consecutive naturals, namely, 6759554 + ... + 6759585.

It is an arithmetic number, because the mean of its divisors is an integer number (41909334).

Almost surely, 2^216306224 is an apocalyptic number.

It is an amenable number.

216306224 is a deficient number, since it is larger than the sum of its proper divisors (202787116).

216306224 is a wasteful number, since it uses less digits than its factorization.

216306224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13519147 (or 13519141 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 216306224 is about 14707.3527189634. The cubic root of 216306224 is about 600.2834068539.

Adding to 216306224 its reverse (422603612), we get a palindrome (638909836).

The spelling of 216306224 in words is "two hundred sixteen million, three hundred six thousand, two hundred twenty-four".