11131915 has 4 divisors (see below), whose sum is σ = 13358304. Its totient is φ = 8905528.

The previous prime is 11131907. The next prime is 11131921. The reversal of 11131915 is 51913111.

11131915 is digitally balanced in base 2 and base 3, because in such bases 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: 51913111 = 19 ⋅2732269.

It is a cyclic number.

It is not a de Polignac number, because 11131915 - 2³ = 11131907 is a prime.

It is a Duffinian 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, 1113187 + ... + 1113196.

It is an arithmetic number, because the mean of its divisors is an integer number (3339576).

Almost surely, 2^11131915 is an apocalyptic number.

11131915 is a deficient number, since it is larger than the sum of its proper divisors (2226389).

11131915 is an equidigital number, since it uses as much as digits as its factorization.

11131915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226388.

The product of its digits is 135, while the sum is 22.

The square root of 11131915 is about 3336.4524573265. The cubic root of 11131915 is about 223.2834979519.

The spelling of 11131915 in words is "eleven million, one hundred thirty-one thousand, nine hundred fifteen".