1311532517 has 2 divisors, whose sum is σ = 1311532518. Its totient is φ = 1311532516.

The previous prime is 1311532501. The next prime is 1311532567. The reversal of 1311532517 is 7152351131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1302776836 + 8755681 = 36094^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311532517 - 2⁴ = 1311532501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311532517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311532567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655766258 + 655766259.

It is an arithmetic number, because the mean of its divisors is an integer number (655766259).

Almost surely, 2^1311532517 is an apocalyptic number.

It is an amenable number.

1311532517 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311532517 is an equidigital number, since it uses as much as digits as its factorization.

1311532517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3150, while the sum is 29.

The square root of 1311532517 is about 36215.0868699773. The cubic root of 1311532517 is about 1094.6106959661.

Adding to 1311532517 its reverse (7152351131), we get a palindrome (8463883648).

The spelling of 1311532517 in words is "one billion, three hundred eleven million, five hundred thirty-two thousand, five hundred seventeen".