1031131513 has 2 divisors, whose sum is σ = 1031131514. Its totient is φ = 1031131512.

The previous prime is 1031131489. The next prime is 1031131547. The reversal of 1031131513 is 3151311301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 894428649 + 136702864 = 29907^2 + 11692^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031131513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031131553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515565756 + 515565757.

It is an arithmetic number, because the mean of its divisors is an integer number (515565757).

Almost surely, 2^1031131513 is an apocalyptic number.

It is an amenable number.

1031131513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031131513 is an equidigital number, since it uses as much as digits as its factorization.

1031131513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 1031131513 is about 32111.2365535804. The cubic root of 1031131513 is about 1010.2713099841.

Adding to 1031131513 its reverse (3151311301), we get a palindrome (4182442814).

The spelling of 1031131513 in words is "one billion, thirty-one million, one hundred thirty-one thousand, five hundred thirteen".