13520531131 has 2 divisors, whose sum is σ = 13520531132. Its totient is φ = 13520531130.

The previous prime is 13520531039. The next prime is 13520531147. The reversal of 13520531131 is 13113502531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13520531131 - 2¹⁷ = 13520400059 is a prime.

It is a super-2 number, since 2×13520531131² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13520531096 and 13520531105.

It is not a weakly prime, because it can be changed into another prime (13520531831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760265565 + 6760265566.

It is an arithmetic number, because the mean of its divisors is an integer number (6760265566).

Almost surely, 2^13520531131 is an apocalyptic number.

13520531131 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520531131 is an equidigital number, since it uses as much as digits as its factorization.

13520531131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350, while the sum is 25.

The spelling of 13520531131 in words is "thirteen billion, five hundred twenty million, five hundred thirty-one thousand, one hundred thirty-one".