23581332 has 18 divisors (see below), whose sum is σ = 59608458. Its totient is φ = 7860432.

The previous prime is 23581331. The next prime is 23581367. The reversal of 23581332 is 23318532.

It can be written as a sum of positive squares in only one way, i.e., 19395216 + 4186116 = 4404^2 + 2046^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 23581296 and 23581305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23581331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 327483 + ... + 327554.

It is an arithmetic number, because the mean of its divisors is an integer number (3311581).

Almost surely, 2^23581332 is an apocalyptic number.

It is an amenable number.

23581332 is an abundant number, since it is smaller than the sum of its proper divisors (36027126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23581332 is a wasteful number, since it uses less digits than its factorization.

23581332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655047 (or 655042 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 23581332 is about 4856.0613669928. The cubic root of 23581332 is about 286.7627770999.

Adding to 23581332 its reverse (23318532), we get a palindrome (46899864).

The spelling of 23581332 in words is "twenty-three million, five hundred eighty-one thousand, three hundred thirty-two".