216623250 has 96 divisors (see below), whose sum is σ = 599639040. Its totient is φ = 56397600.

The previous prime is 216623249. The next prime is 216623273. The reversal of 216623250 is 52326612.

216623250 is a `hidden beast` number, since 2 + 16 + 623 + 25 + 0 = 666.

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 in 47 ways as a sum of consecutive naturals, for example, 95631 + ... + 97869.

It is an arithmetic number, because the mean of its divisors is an integer number (6246240).

Almost surely, 2^216623250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216623250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299819520).

216623250 is an abundant number, since it is smaller than the sum of its proper divisors (383015790).

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

216623250 is a wasteful number, since it uses less digits than its factorization.

216623250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305 (or 2292 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 216623250 is about 14718.1265791540. The cubic root of 216623250 is about 600.5765291794.

Adding to 216623250 its reverse (52326612), we get a palindrome (268949862).

The spelling of 216623250 in words is "two hundred sixteen million, six hundred twenty-three thousand, two hundred fifty".