11313561 has 12 divisors (see below), whose sum is σ = 17547792. Its totient is φ = 6464808.

The previous prime is 11313559. The next prime is 11313563. The reversal of 11313561 is 16531311.

11313561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11313559) and next prime (11313563).

It is not a de Polignac number, because 11313561 - 2¹ = 11313559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (11313563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38335 + ... + 38628.

It is an arithmetic number, because the mean of its divisors is an integer number (1462316).

Almost surely, 2^11313561 is an apocalyptic number.

It is an amenable number.

11313561 is a deficient number, since it is larger than the sum of its proper divisors (6234231).

11313561 is an equidigital number, since it uses as much as digits as its factorization.

11313561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76980 (or 76973 counting only the distinct ones).

The product of its digits is 270, while the sum is 21.

The square root of 11313561 is about 3363.5637350881. The cubic root of 11313561 is about 224.4914340741.

Adding to 11313561 its reverse (16531311), we get a palindrome (27844872).

The spelling of 11313561 in words is "eleven million, three hundred thirteen thousand, five hundred sixty-one".