216715390 has 8 divisors (see below), whose sum is σ = 390087720. Its totient is φ = 86686152.

The previous prime is 216715333. The next prime is 216715391. The reversal of 216715390 is 93517612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216715391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10835760 + ... + 10835779.

It is an arithmetic number, because the mean of its divisors is an integer number (48760965).

Almost surely, 2^216715390 is an apocalyptic number.

216715390 is a deficient number, since it is larger than the sum of its proper divisors (173372330).

216715390 is a wasteful number, since it uses less digits than its factorization.

216715390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21671546.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 216715390 is about 14721.2564001854. The cubic root of 216715390 is about 600.6616682052.

The spelling of 216715390 in words is "two hundred sixteen million, seven hundred fifteen thousand, three hundred ninety".