11538815 has 4 divisors (see below), whose sum is σ = 13846584. Its totient is φ = 9231048.

The previous prime is 11538811. The next prime is 11538817. The reversal of 11538815 is 51883511.

It is a happy number.

11538815 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.

It is a cyclic number.

It is not a de Polignac number, because 11538815 - 2² = 11538811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11538811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1153877 + ... + 1153886.

It is an arithmetic number, because the mean of its divisors is an integer number (3461646).

Almost surely, 2^11538815 is an apocalyptic number.

11538815 is a deficient number, since it is larger than the sum of its proper divisors (2307769).

11538815 is an equidigital number, since it uses as much as digits as its factorization.

11538815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307768.

The product of its digits is 4800, while the sum is 32.

The square root of 11538815 is about 3396.8831301651. The cubic root of 11538815 is about 225.9715355594.

The spelling of 11538815 in words is "eleven million, five hundred thirty-eight thousand, eight hundred fifteen".