23565442 has 4 divisors (see below), whose sum is σ = 35348166. Its totient is φ = 11782720.

The previous prime is 23565439. The next prime is 23565449. The reversal of 23565442 is 24456532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19193161 + 4372281 = 4381^2 + 2091^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (23565449) 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 as a sum of consecutive naturals, namely, 5891359 + ... + 5891362.

Almost surely, 2^23565442 is an apocalyptic number.

23565442 is a deficient number, since it is larger than the sum of its proper divisors (11782724).

23565442 is a wasteful number, since it uses less digits than its factorization.

23565442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11782723.

The product of its digits is 28800, while the sum is 31.

The square root of 23565442 is about 4854.4249916957. The cubic root of 23565442 is about 286.6983520652.

The spelling of 23565442 in words is "twenty-three million, five hundred sixty-five thousand, four hundred forty-two".