201516165 has 12 divisors (see below), whose sum is σ = 349294764. Its totient is φ = 107475264.

The previous prime is 201516143. The next prime is 201516191. The reversal of 201516165 is 561615102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 117353889 + 84162276 = 10833^2 + 9174^2 .

It is not a de Polignac number, because 201516165 - 2¹⁸ = 201254021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2239024 + ... + 2239113.

It is an arithmetic number, because the mean of its divisors is an integer number (29107897).

Almost surely, 2^201516165 is an apocalyptic number.

It is an amenable number.

201516165 is a deficient number, since it is larger than the sum of its proper divisors (147778599).

201516165 is a wasteful number, since it uses less digits than its factorization.

201516165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478148 (or 4478145 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 201516165 is about 14195.6389429994. The cubic root of 201516165 is about 586.2775935173.

The spelling of 201516165 in words is "two hundred one million, five hundred sixteen thousand, one hundred sixty-five".