2015111541 has 16 divisors (see below), whose sum is σ = 2846016000. Its totient is φ = 1263871488.

The previous prime is 2015111533. The next prime is 2015111597. The reversal of 2015111541 is 1451115102.

It is not a de Polignac number, because 2015111541 - 2³ = 2015111533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015111521) 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, 149020 + ... + 161978.

It is an arithmetic number, because the mean of its divisors is an integer number (177876000).

Almost surely, 2^2015111541 is an apocalyptic number.

It is an amenable number.

2015111541 is a deficient number, since it is larger than the sum of its proper divisors (830904459).

2015111541 is a wasteful number, since it uses less digits than its factorization.

2015111541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16028.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 2015111541 is about 44889.9937736685. The cubic root of 2015111541 is about 1263.0863159890.

Adding to 2015111541 its reverse (1451115102), we get a palindrome (3466226643).

The spelling of 2015111541 in words is "two billion, fifteen million, one hundred eleven thousand, five hundred forty-one".