165715216 has 10 divisors (see below), whose sum is σ = 321073262. Its totient is φ = 82857600.

The previous prime is 165715213. The next prime is 165715217. The reversal of 165715216 is 612517561.

It can be written as a sum of positive squares in only one way, i.e., 141705216 + 24010000 = 11904^2 + 4900^2 .

It is not an unprimeable number, because it can be changed into a prime (165715211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5178585 + ... + 5178616.

Almost surely, 2^165715216 is an apocalyptic number.

165715216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

165715216 is a deficient number, since it is larger than the sum of its proper divisors (155358046).

165715216 is a wasteful number, since it uses less digits than its factorization.

165715216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10357209 (or 10357203 counting only the distinct ones).

The product of its digits is 12600, while the sum is 34.

The square root of 165715216 is about 12873.0422200815. The cubic root of 165715216 is about 549.2720021127.

The spelling of 165715216 in words is "one hundred sixty-five million, seven hundred fifteen thousand, two hundred sixteen".