216974165 has 8 divisors (see below), whose sum is σ = 262094208. Its totient is φ = 172429200.

The previous prime is 216974117. The next prime is 216974183. The reversal of 216974165 is 561479612.

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

It is not a de Polignac number, because 216974165 - 2⁶ = 216974101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142937 + ... + 144446.

It is an arithmetic number, because the mean of its divisors is an integer number (32761776).

Almost surely, 2^216974165 is an apocalyptic number.

It is an amenable number.

216974165 is a deficient number, since it is larger than the sum of its proper divisors (45120043).

216974165 is a wasteful number, since it uses less digits than its factorization.

216974165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287539.

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

The square root of 216974165 is about 14730.0429395165. The cubic root of 216974165 is about 600.9006519965.

The spelling of 216974165 in words is "two hundred sixteen million, nine hundred seventy-four thousand, one hundred sixty-five".