11563161 has 4 divisors (see below), whose sum is σ = 15417552. Its totient is φ = 7708772.

The previous prime is 11563157. The next prime is 11563163. The reversal of 11563161 is 16136511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11563161 - 2² = 11563157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11563163) 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, 1927191 + ... + 1927196.

It is an arithmetic number, because the mean of its divisors is an integer number (3854388).

Almost surely, 2^11563161 is an apocalyptic number.

It is an amenable number.

11563161 is a deficient number, since it is larger than the sum of its proper divisors (3854391).

11563161 is an equidigital number, since it uses as much as digits as its factorization.

11563161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854390.

The product of its digits is 540, while the sum is 24.

The square root of 11563161 is about 3400.4648211678. The cubic root of 11563161 is about 226.1303513559.

Adding to 11563161 its reverse (16136511), we get a palindrome (27699672).

The spelling of 11563161 in words is "eleven million, five hundred sixty-three thousand, one hundred sixty-one".