165017215 has 16 divisors (see below), whose sum is σ = 228731040. Its totient is φ = 112952320.

The previous prime is 165017213. The next prime is 165017231. The reversal of 165017215 is 512710561.

It is not a de Polignac number, because 165017215 - 2¹ = 165017213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165017213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87310 + ... + 89179.

It is an arithmetic number, because the mean of its divisors is an integer number (14295690).

Almost surely, 2^165017215 is an apocalyptic number.

165017215 is a deficient number, since it is larger than the sum of its proper divisors (63713825).

165017215 is a wasteful number, since it uses less digits than its factorization.

165017215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176522.

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 165017215 is about 12845.9026541540. The cubic root of 165017215 is about 548.4997295183.

Adding to 165017215 its reverse (512710561), we get a palindrome (677727776).

It can be divided in two parts, 16501 and 7215, that added together give a square (23716 = 154²).

The spelling of 165017215 in words is "one hundred sixty-five million, seventeen thousand, two hundred fifteen".