216160965 has 24 divisors (see below), whose sum is σ = 376635480. Its totient is φ = 114683904.

The previous prime is 216160963. The next prime is 216161021. The reversal of 216160965 is 569061612.

216160965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6548481 + 209612484 = 2559^2 + 14478^2 .

It is not a de Polignac number, because 216160965 - 2¹ = 216160963 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216160963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3760 + ... + 21129.

It is an arithmetic number, because the mean of its divisors is an integer number (15693145).

Almost surely, 2^216160965 is an apocalyptic number.

It is an amenable number.

216160965 is a deficient number, since it is larger than the sum of its proper divisors (160474515).

216160965 is a wasteful number, since it uses less digits than its factorization.

216160965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25093 (or 25090 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 216160965 is about 14702.4135773689. The cubic root of 216160965 is about 600.1490046596.

The spelling of 216160965 in words is "two hundred sixteen million, one hundred sixty thousand, nine hundred sixty-five".