2015118117 has 6 divisors (see below), whose sum is σ = 2910726182. Its totient is φ = 1343412072.

The previous prime is 2015118089. The next prime is 2015118121. The reversal of 2015118117 is 7118115102.

It can be written as a sum of positive squares in only one way, i.e., 1997553636 + 17564481 = 44694^2 + 4191^2 .

It is not a de Polignac number, because 2015118117 - 2¹⁵ = 2015085349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015118317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111950998 + ... + 111951015.

Almost surely, 2^2015118117 is an apocalyptic number.

It is an amenable number.

2015118117 is a deficient number, since it is larger than the sum of its proper divisors (895608065).

2015118117 is a wasteful number, since it uses less digits than its factorization.

2015118117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223902019 (or 223902016 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 27.

The square root of 2015118117 is about 44890.0670193307. The cubic root of 2015118117 is about 1263.0876899488.

It can be divided in two parts, 201511 and 8117, that added together give a triangular number (209628 = T₆₄₇).

The spelling of 2015118117 in words is "two billion, fifteen million, one hundred eighteen thousand, one hundred seventeen".