11515220315 has 8 divisors (see below), whose sum is σ = 13888409040. Its totient is φ = 9165413152.

The previous prime is 11515220309. The next prime is 11515220323. The reversal of 11515220315 is 51302251511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11515220315 - 2⁶ = 11515220251 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5844305 + ... + 5846274.

It is an arithmetic number, because the mean of its divisors is an integer number (1736051130).

Almost surely, 2^11515220315 is an apocalyptic number.

11515220315 is a deficient number, since it is larger than the sum of its proper divisors (2373188725).

11515220315 is a wasteful number, since it uses less digits than its factorization.

11515220315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11690781.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 11515220315 its reverse (51302251511), we get a palindrome (62817471826).

The spelling of 11515220315 in words is "eleven billion, five hundred fifteen million, two hundred twenty thousand, three hundred fifteen".