13013123531 has 2 divisors, whose sum is σ = 13013123532. Its totient is φ = 13013123530.

The previous prime is 13013123527. The next prime is 13013123573. The reversal of 13013123531 is 13532131031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13013123531 - 2² = 13013123527 is a prime.

It is a super-2 number, since 2×13013123531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13013123497 and 13013123506.

It is not a weakly prime, because it can be changed into another prime (13013123521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6506561765 + 6506561766.

It is an arithmetic number, because the mean of its divisors is an integer number (6506561766).

Almost surely, 2^13013123531 is an apocalyptic number.

13013123531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13013123531 is an equidigital number, since it uses as much as digits as its factorization.

13013123531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 23.

Adding to 13013123531 its reverse (13532131031), we get a palindrome (26545254562).

The spelling of 13013123531 in words is "thirteen billion, thirteen million, one hundred twenty-three thousand, five hundred thirty-one".