23564161 has 4 divisors (see below), whose sum is σ = 24804400. Its totient is φ = 22323924.

The previous prime is 23564147. The next prime is 23564173. The reversal of 23564161 is 16146532.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23564161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23564111) 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 3 ways as a sum of consecutive naturals, for example, 620091 + ... + 620128.

It is an arithmetic number, because the mean of its divisors is an integer number (6201100).

Almost surely, 2^23564161 is an apocalyptic number.

It is an amenable number.

23564161 is a deficient number, since it is larger than the sum of its proper divisors (1240239).

23564161 is a wasteful number, since it uses less digits than its factorization.

23564161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240238.

The product of its digits is 4320, while the sum is 28.

The square root of 23564161 is about 4854.2930484263. The cubic root of 23564161 is about 286.6931570676.

The spelling of 23564161 in words is "twenty-three million, five hundred sixty-four thousand, one hundred sixty-one".