13531352231 has 2 divisors, whose sum is σ = 13531352232. Its totient is φ = 13531352230.

The previous prime is 13531352213. The next prime is 13531352243. The reversal of 13531352231 is 13225313531.

It is a happy number.

Together with previous prime (13531352213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531352231 is a prime.

It is a super-2 number, since 2×13531352231² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 13531352194 and 13531352203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13531352281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765676115 + 6765676116.

It is an arithmetic number, because the mean of its divisors is an integer number (6765676116).

Almost surely, 2^13531352231 is an apocalyptic number.

13531352231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531352231 is an equidigital number, since it uses as much as digits as its factorization.

13531352231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 29.

Adding to 13531352231 its reverse (13225313531), we get a palindrome (26756665762).

The spelling of 13531352231 in words is "thirteen billion, five hundred thirty-one million, three hundred fifty-two thousand, two hundred thirty-one".