11561823 has 48 divisors (see below), whose sum is σ = 21665280. Its totient is φ = 5769792.

The previous prime is 11561779. The next prime is 11561827. The reversal of 11561823 is 32816511.

11561823 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11561823 - 2¹³ = 11553631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561827) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15190 + ... + 15932.

It is an arithmetic number, because the mean of its divisors is an integer number (451360).

Almost surely, 2^11561823 is an apocalyptic number.

11561823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11561823 is a deficient number, since it is larger than the sum of its proper divisors (10103457).

11561823 is a wasteful number, since it uses less digits than its factorization.

11561823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 785 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 11561823 is about 3400.2680776668. The cubic root of 11561823 is about 226.1216289982.

The spelling of 11561823 in words is "eleven million, five hundred sixty-one thousand, eight hundred twenty-three".