11915215 has 32 divisors (see below), whose sum is σ = 16765056. Its totient is φ = 8048640.

The previous prime is 11915179. The next prime is 11915237. The reversal of 11915215 is 51251911.

It is a happy number.

It is not a de Polignac number, because 11915215 - 2¹⁹ = 11390927 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 11915215.

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 31 ways as a sum of consecutive naturals, for example, 45174 + ... + 45436.

It is an arithmetic number, because the mean of its divisors is an integer number (523908).

Almost surely, 2^11915215 is an apocalyptic number.

11915215 is a deficient number, since it is larger than the sum of its proper divisors (4849841).

11915215 is a wasteful number, since it uses less digits than its factorization.

11915215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339.

The product of its digits is 450, while the sum is 25.

The square root of 11915215 is about 3451.8422617495. The cubic root of 11915215 is about 228.4023814241.

The spelling of 11915215 in words is "eleven million, nine hundred fifteen thousand, two hundred fifteen".