11513443215 has 16 divisors (see below), whose sum is σ = 18424813536. Its totient is φ = 6139401600.

The previous prime is 11513443177. The next prime is 11513443261. The reversal of 11513443215 is 51234431511.

11513443215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11513443215 - 2⁷ = 11513443087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21385 + ... + 153245.

It is an arithmetic number, because the mean of its divisors is an integer number (1151550846).

Almost surely, 2^11513443215 is an apocalyptic number.

11513443215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11513443215 is a deficient number, since it is larger than the sum of its proper divisors (6911370321).

11513443215 is a wasteful number, since it uses less digits than its factorization.

11513443215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137690.

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

Adding to 11513443215 its reverse (51234431511), we get a palindrome (62747874726).

The spelling of 11513443215 in words is "eleven billion, five hundred thirteen million, four hundred forty-three thousand, two hundred fifteen".