165016417 has 4 divisors (see below), whose sum is σ = 165543940. Its totient is φ = 164488896.

The previous prime is 165016391. The next prime is 165016429. The reversal of 165016417 is 714610561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29550096 + 135466321 = 5436^2 + 11639^2 .

It is a cyclic number.

It is not a de Polignac number, because 165016417 - 2¹⁹ = 164492129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165016447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263292 + ... + 263917.

It is an arithmetic number, because the mean of its divisors is an integer number (41385985).

Almost surely, 2^165016417 is an apocalyptic number.

It is an amenable number.

165016417 is a deficient number, since it is larger than the sum of its proper divisors (527523).

165016417 is an equidigital number, since it uses as much as digits as its factorization.

165016417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527522.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 165016417 is about 12845.8715936288. The cubic root of 165016417 is about 548.4988453610.

Adding to 165016417 its reverse (714610561), we get a palindrome (879626978).

The spelling of 165016417 in words is "one hundred sixty-five million, sixteen thousand, four hundred seventeen".