2531320015521 has 16 divisors (see below), whose sum is σ = 3681949572288. Its totient is φ = 1534121030400.

The previous prime is 2531320015513. The next prime is 2531320015529. The reversal of 2531320015521 is 1255100231352.

2531320015521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2531320015513) and next prime (2531320015529).

It is not a de Polignac number, because 2531320015521 - 2³ = 2531320015513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2531320015529) 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, 5504341 + ... + 5946461.

It is an arithmetic number, because the mean of its divisors is an integer number (230121848268).

Almost surely, 2^{2531320015521} is an apocalyptic number.

It is an amenable number.

2531320015521 is a deficient number, since it is larger than the sum of its proper divisors (1150629556767).

2531320015521 is a wasteful number, since it uses less digits than its factorization.

2531320015521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615632.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 2531320015521 its reverse (1255100231352), we get a palindrome (3786420246873).

The spelling of 2531320015521 in words is "two trillion, five hundred thirty-one billion, three hundred twenty million, fifteen thousand, five hundred twenty-one".