11531013541 has 2 divisors, whose sum is σ = 11531013542. Its totient is φ = 11531013540.

The previous prime is 11531013539. The next prime is 11531013617. The reversal of 11531013541 is 14531013511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8290102500 + 3240911041 = 91050^2 + 56929^2 .

It is a cyclic number.

It is not a de Polignac number, because 11531013541 - 2¹ = 11531013539 is a prime.

Together with 11531013539, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11531013941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5765506770 + 5765506771.

It is an arithmetic number, because the mean of its divisors is an integer number (5765506771).

Almost surely, 2^11531013541 is an apocalyptic number.

It is an amenable number.

11531013541 is a deficient number, since it is larger than the sum of its proper divisors (1).

11531013541 is an equidigital number, since it uses as much as digits as its factorization.

11531013541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 25.

The spelling of 11531013541 in words is "eleven billion, five hundred thirty-one million, thirteen thousand, five hundred forty-one".