23716561 has 8 divisors (see below), whose sum is σ = 25923744. Its totient is φ = 21517920.

The previous prime is 23716559. The next prime is 23716571. The reversal of 23716561 is 16561732.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23716561 - 2¹ = 23716559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23716531) 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 7 ways as a sum of consecutive naturals, for example, 4621 + ... + 8293.

It is an arithmetic number, because the mean of its divisors is an integer number (3240468).

Almost surely, 2^23716561 is an apocalyptic number.

It is an amenable number.

23716561 is a deficient number, since it is larger than the sum of its proper divisors (2207183).

23716561 is a wasteful number, since it uses less digits than its factorization.

23716561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4271.

The product of its digits is 7560, while the sum is 31.

The square root of 23716561 is about 4869.9651949475. The cubic root of 23716561 is about 287.3098871678.

The spelling of 23716561 in words is "twenty-three million, seven hundred sixteen thousand, five hundred sixty-one".