11516215135 has 4 divisors (see below), whose sum is σ = 13819458168. Its totient is φ = 9212972104.

The previous prime is 11516215129. The next prime is 11516215147. The reversal of 11516215135 is 53151261511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53151261511 = 7883 ⋅6742517.

It is a cyclic number.

It is not a de Polignac number, because 11516215135 - 2³ = 11516215127 is a prime.

It is a super-2 number, since 2×11516215135² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11516215097 and 11516215106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1151621509 + ... + 1151621518.

It is an arithmetic number, because the mean of its divisors is an integer number (3454864542).

Almost surely, 2^11516215135 is an apocalyptic number.

11516215135 is a deficient number, since it is larger than the sum of its proper divisors (2303243033).

11516215135 is an equidigital number, since it uses as much as digits as its factorization.

11516215135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303243032.

The product of its digits is 4500, while the sum is 31.

Adding to 11516215135 its reverse (53151261511), we get a palindrome (64667476646).

The spelling of 11516215135 in words is "eleven billion, five hundred sixteen million, two hundred fifteen thousand, one hundred thirty-five".