11565163 has 4 divisors (see below), whose sum is σ = 11598840. Its totient is φ = 11531488.

The previous prime is 11565161. The next prime is 11565179. The reversal of 11565163 is 36156511.

11565163 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: 36156511 = 37 ⋅977203.

It is a cyclic number.

It is not a de Polignac number, because 11565163 - 2¹ = 11565161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11565161) 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, 16318 + ... + 17011.

It is an arithmetic number, because the mean of its divisors is an integer number (2899710).

Almost surely, 2^11565163 is an apocalyptic number.

11565163 is a deficient number, since it is larger than the sum of its proper divisors (33677).

11565163 is an equidigital number, since it uses as much as digits as its factorization.

11565163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33676.

The product of its digits is 2700, while the sum is 28.

The square root of 11565163 is about 3400.7591799479. The cubic root of 11565163 is about 226.1434010413.

The spelling of 11565163 in words is "eleven million, five hundred sixty-five thousand, one hundred sixty-three".