216320847 has 8 divisors (see below), whose sum is σ = 288629760. Its totient is φ = 144112920.

The previous prime is 216320813. The next prime is 216320851. The reversal of 216320847 is 748023612.

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

It is not a de Polignac number, because 216320847 - 2¹¹ = 216318799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216320807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20097 + ... + 28922.

It is an arithmetic number, because the mean of its divisors is an integer number (36078720).

Almost surely, 2^216320847 is an apocalyptic number.

216320847 is a deficient number, since it is larger than the sum of its proper divisors (72308913).

216320847 is a wasteful number, since it uses less digits than its factorization.

216320847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50493.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 216320847 is about 14707.8498428560. The cubic root of 216320847 is about 600.2969335821.

The spelling of 216320847 in words is "two hundred sixteen million, three hundred twenty thousand, eight hundred forty-seven".