216715650 has 24 divisors (see below), whose sum is σ = 537455184. Its totient is φ = 57790800.

The previous prime is 216715649. The next prime is 216715669. The reversal of 216715650 is 56517612.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 722236 + ... + 722535.

It is an arithmetic number, because the mean of its divisors is an integer number (22393966).

Almost surely, 2^216715650 is an apocalyptic number.

216715650 is an abundant number, since it is smaller than the sum of its proper divisors (320739534).

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

216715650 is a wasteful number, since it uses less digits than its factorization.

216715650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444786 (or 1444781 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 216715650 is about 14721.2652309508. The cubic root of 216715650 is about 600.6619084158.

The spelling of 216715650 in words is "two hundred sixteen million, seven hundred fifteen thousand, six hundred fifty".