13531015249 has 2 divisors, whose sum is σ = 13531015250. Its totient is φ = 13531015248.

The previous prime is 13531015247. The next prime is 13531015279. The reversal of 13531015249 is 94251013531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13261825600 + 269189649 = 115160^2 + 16407^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531015249 - 2¹ = 13531015247 is a prime.

Together with 13531015247, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13531015247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765507624 + 6765507625.

It is an arithmetic number, because the mean of its divisors is an integer number (6765507625).

Almost surely, 2^13531015249 is an apocalyptic number.

It is an amenable number.

13531015249 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531015249 is an equidigital number, since it uses as much as digits as its factorization.

13531015249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 13531015249 in words is "thirteen billion, five hundred thirty-one million, fifteen thousand, two hundred forty-nine".