11561113 has 4 divisors (see below), whose sum is σ = 11571408. Its totient is φ = 11550820.

The previous prime is 11561089. The next prime is 11561117. The reversal of 11561113 is 31116511.

11561113 is digitally balanced in base 3, because in such base 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 a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11561113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11561117) 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, 3223 + ... + 5788.

It is an arithmetic number, because the mean of its divisors is an integer number (2892852).

Almost surely, 2^11561113 is an apocalyptic number.

It is an amenable number.

11561113 is a deficient number, since it is larger than the sum of its proper divisors (10295).

11561113 is an equidigital number, since it uses as much as digits as its factorization.

11561113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10294.

The product of its digits is 90, while the sum is 19.

The square root of 11561113 is about 3400.1636725311. The cubic root of 11561113 is about 226.1170002690.

Adding to 11561113 its reverse (31116511), we get a palindrome (42677624).

The spelling of 11561113 in words is "eleven million, five hundred sixty-one thousand, one hundred thirteen".