216964571 has 8 divisors (see below), whose sum is σ = 219684960. Its totient is φ = 214260928.

The previous prime is 216964529. The next prime is 216964597. The reversal of 216964571 is 175469612.

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

It is a cyclic number.

It is not a de Polignac number, because 216964571 - 2⁶ = 216964507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216964511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22970 + ... + 31008.

It is an arithmetic number, because the mean of its divisors is an integer number (27460620).

Almost surely, 2^216964571 is an apocalyptic number.

216964571 is a deficient number, since it is larger than the sum of its proper divisors (2720389).

216964571 is a wasteful number, since it uses less digits than its factorization.

216964571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8373.

The product of its digits is 90720, while the sum is 41.

The square root of 216964571 is about 14729.7172749513. The cubic root of 216964571 is about 600.8917951420.

The spelling of 216964571 in words is "two hundred sixteen million, nine hundred sixty-four thousand, five hundred seventy-one".