13131521747 has 2 divisors, whose sum is σ = 13131521748. Its totient is φ = 13131521746.

The previous prime is 13131521731. The next prime is 13131521759. The reversal of 13131521747 is 74712513131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13131521747 - 2⁴ = 13131521731 is a prime.

It is not a weakly prime, because it can be changed into another prime (13131521717) 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, 6565760873 + 6565760874.

It is an arithmetic number, because the mean of its divisors is an integer number (6565760874).

Almost surely, 2^13131521747 is an apocalyptic number.

13131521747 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131521747 is an equidigital number, since it uses as much as digits as its factorization.

13131521747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 35.

The spelling of 13131521747 in words is "thirteen billion, one hundred thirty-one million, five hundred twenty-one thousand, seven hundred forty-seven".