216041224 has 64 divisors (see below), whose sum is σ = 479784960. Its totient is φ = 89268480.

The previous prime is 216041207. The next prime is 216041233. The reversal of 216041224 is 422140612.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 216041195 and 216041204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262734 + ... + 263554.

It is an arithmetic number, because the mean of its divisors is an integer number (7496640).

Almost surely, 2^216041224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216041224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (239892480).

216041224 is an abundant number, since it is smaller than the sum of its proper divisors (263743736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216041224 is a wasteful number, since it uses less digits than its factorization.

216041224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 216041224 is about 14698.3408587500. The cubic root of 216041224 is about 600.0381679423.

Adding to 216041224 its reverse (422140612), we get a palindrome (638181836).

The spelling of 216041224 in words is "two hundred sixteen million, forty-one thousand, two hundred twenty-four".