2531571313 has 4 divisors (see below), whose sum is σ = 2531700388. Its totient is φ = 2531442240.

The previous prime is 2531571311. The next prime is 2531571319. The reversal of 2531571313 is 3131751352.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 628605184 + 1902966129 = 25072^2 + 43623^2 .

It is a cyclic number.

It is not a de Polignac number, because 2531571313 - 2¹ = 2531571311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531571311) 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, 28356 + ... + 76597.

It is an arithmetic number, because the mean of its divisors is an integer number (632925097).

Almost surely, 2^2531571313 is an apocalyptic number.

It is an amenable number.

2531571313 is a deficient number, since it is larger than the sum of its proper divisors (129075).

2531571313 is a wasteful number, since it uses less digits than its factorization.

2531571313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129074.

The product of its digits is 9450, while the sum is 31.

The square root of 2531571313 is about 50314.7226266825. The cubic root of 2531571313 is about 1362.8981078109.

The spelling of 2531571313 in words is "two billion, five hundred thirty-one million, five hundred seventy-one thousand, three hundred thirteen".