11531013511 has 16 divisors (see below), whose sum is σ = 11959170048. Its totient is φ = 11110932000.

The previous prime is 11531013509. The next prime is 11531013523.

11531013511 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11531013511 - 2¹ = 11531013509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11531013541) 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 in 15 ways as a sum of consecutive naturals, for example, 2844436 + ... + 2848486.

It is an arithmetic number, because the mean of its divisors is an integer number (747448128).

Almost surely, 2^11531013511 is an apocalyptic number.

11531013511 is a deficient number, since it is larger than the sum of its proper divisors (428156537).

11531013511 is an equidigital number, since it uses as much as digits as its factorization.

11531013511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022.

The product of its (nonzero) digits is 225, while the sum is 22.

It can be divided in two parts, 115310 and 13511, that added together give a palindrome (128821).

The spelling of 11531013511 in words is "eleven billion, five hundred thirty-one million, thirteen thousand, five hundred eleven".