11513542431 has 4 divisors (see below), whose sum is σ = 15351389912. Its totient is φ = 7675694952.

The previous prime is 11513542429. The next prime is 11513542471. The reversal of 11513542431 is 13424531511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13424531511 = 3 ⋅4474843837.

It is not a de Polignac number, because 11513542431 - 2¹ = 11513542429 is a prime.

It is a super-2 number, since 2×11513542431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11513542421) 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 3 ways as a sum of consecutive naturals, for example, 1918923736 + ... + 1918923741.

It is an arithmetic number, because the mean of its divisors is an integer number (3837847478).

Almost surely, 2^11513542431 is an apocalyptic number.

11513542431 is a deficient number, since it is larger than the sum of its proper divisors (3837847481).

11513542431 is an equidigital number, since it uses as much as digits as its factorization.

11513542431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3837847480.

The product of its digits is 7200, while the sum is 30.

The spelling of 11513542431 in words is "eleven billion, five hundred thirteen million, five hundred forty-two thousand, four hundred thirty-one".