2015531013 has 16 divisors (see below), whose sum is σ = 2754303552. Its totient is φ = 1310256000.

The previous prime is 2015530991. The next prime is 2015531017. The reversal of 2015531013 is 3101355102.

It is not a de Polignac number, because 2015531013 - 2¹⁶ = 2015465477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015531017) 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, 412203 + ... + 417063.

It is an arithmetic number, because the mean of its divisors is an integer number (172143972).

Almost surely, 2^2015531013 is an apocalyptic number.

It is an amenable number.

2015531013 is a deficient number, since it is larger than the sum of its proper divisors (738772539).

2015531013 is a wasteful number, since it uses less digits than its factorization.

2015531013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8276.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 2015531013 is about 44894.6657521804. The cubic root of 2015531013 is about 1263.1739525909.

Adding to 2015531013 its reverse (3101355102), we get a palindrome (5116886115).

It can be divided in two parts, 201553 and 1013, that added together give a triangular number (202566 = T₆₃₆).

The spelling of 2015531013 in words is "two billion, fifteen million, five hundred thirty-one thousand, thirteen".