13531031243 has 2 divisors, whose sum is σ = 13531031244. Its totient is φ = 13531031242.

The previous prime is 13531031237. The next prime is 13531031263. The reversal of 13531031243 is 34213013531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13531031243 - 2²⁰ = 13529982667 is a prime.

It is a super-3 number, since 3×13531031243³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (13531031263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765515621 + 6765515622.

It is an arithmetic number, because the mean of its divisors is an integer number (6765515622).

Almost surely, 2^13531031243 is an apocalyptic number.

13531031243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531031243 is an equidigital number, since it uses as much as digits as its factorization.

13531031243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 13531031243 its reverse (34213013531), we get a palindrome (47744044774).

The spelling of 13531031243 in words is "thirteen billion, five hundred thirty-one million, thirty-one thousand, two hundred forty-three".