2015166217 has 4 divisors (see below), whose sum is σ = 2015341776. Its totient is φ = 2014990660.

The previous prime is 2015166199. The next prime is 2015166221. The reversal of 2015166217 is 7126615102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2015166217 - 2⁷ = 2015166089 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2015166287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69259 + ... + 93952.

It is an arithmetic number, because the mean of its divisors is an integer number (503835444).

Almost surely, 2^2015166217 is an apocalyptic number.

It is an amenable number.

2015166217 is a deficient number, since it is larger than the sum of its proper divisors (175559).

2015166217 is a wasteful number, since it uses less digits than its factorization.

2015166217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175558.

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

The square root of 2015166217 is about 44890.6027693993. The cubic root of 2015166217 is about 1263.0977396549.

It can be divided in two parts, 20151 and 66217, that added together give a palindrome (86368).

The spelling of 2015166217 in words is "two billion, fifteen million, one hundred sixty-six thousand, two hundred seventeen".