216501366 has 8 divisors (see below), whose sum is σ = 433002744. Its totient is φ = 72167120.

The previous prime is 216501349. The next prime is 216501379. The reversal of 216501366 is 663105612.

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

216501366 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18041775 + ... + 18041786.

It is an arithmetic number, because the mean of its divisors is an integer number (54125343).

Almost surely, 2^216501366 is an apocalyptic number.

216501366 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216501366 is a wasteful number, since it uses less digits than its factorization.

216501366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36083566.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 216501366 is about 14713.9853880585. The cubic root of 216501366 is about 600.4638690612.

Adding to 216501366 its reverse (663105612), we get a palindrome (879606978).

The spelling of 216501366 in words is "two hundred sixteen million, five hundred one thousand, three hundred sixty-six".