11815315 has 4 divisors (see below), whose sum is σ = 14178384. Its totient is φ = 9452248.

The previous prime is 11815313. The next prime is 11815337. The reversal of 11815315 is 51351811.

11815315 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51351811 = 7 ⋅7335973.

It is a cyclic number.

It is not a de Polignac number, because 11815315 - 2¹ = 11815313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11815315.

It is not an unprimeable number, because it can be changed into a prime (11815313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181527 + ... + 1181536.

It is an arithmetic number, because the mean of its divisors is an integer number (3544596).

Almost surely, 2^11815315 is an apocalyptic number.

11815315 is a deficient number, since it is larger than the sum of its proper divisors (2363069).

11815315 is an equidigital number, since it uses as much as digits as its factorization.

11815315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363068.

The product of its digits is 600, while the sum is 25.

The square root of 11815315 is about 3437.3412690625. The cubic root of 11815315 is about 227.7622624548.

The spelling of 11815315 in words is "eleven million, eight hundred fifteen thousand, three hundred fifteen".