3131512525 has 12 divisors (see below), whose sum is σ = 3891586612. Its totient is φ = 2499719040.

The previous prime is 3131512507. The next prime is 3131512529. The reversal of 3131512525 is 5252151313.

It can be written as a sum of positive squares in 6 ways, for example, as 10949481 + 3120563044 = 3309^2 + 55862^2 .

It is not a de Polignac number, because 3131512525 - 2¹³ = 3131504333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131512493 and 3131512502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131512529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125622 + ... + 148471.

Almost surely, 2^3131512525 is an apocalyptic number.

It is an amenable number.

3131512525 is a deficient number, since it is larger than the sum of its proper divisors (760074087).

3131512525 is a wasteful number, since it uses less digits than its factorization.

3131512525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274560 (or 274555 counting only the distinct ones).

The product of its digits is 4500, while the sum is 28.

The square root of 3131512525 is about 55959.9189152379. The cubic root of 3131512525 is about 1463.0237771335.

Adding to 3131512525 its reverse (5252151313), we get a palindrome (8383663838).

The spelling of 3131512525 in words is "three billion, one hundred thirty-one million, five hundred twelve thousand, five hundred twenty-five".