23145565 has 8 divisors (see below), whose sum is σ = 27806688. Its totient is φ = 18495120.

The previous prime is 23145547. The next prime is 23145569. The reversal of 23145565 is 56554132.

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

It is not a de Polignac number, because 23145565 - 2⁵ = 23145533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3334 + ... + 7576.

It is an arithmetic number, because the mean of its divisors is an integer number (3475836).

Almost surely, 2^23145565 is an apocalyptic number.

It is an amenable number.

23145565 is a deficient number, since it is larger than the sum of its proper divisors (4661123).

23145565 is a wasteful number, since it uses less digits than its factorization.

23145565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339.

The product of its digits is 18000, while the sum is 31.

The square root of 23145565 is about 4810.9837871271. The cubic root of 23145565 is about 284.9853896275.

Adding to 23145565 its reverse (56554132), we get a palindrome (79699697).

It can be divided in two parts, 231 and 45565, that added together give a square (45796 = 214²).

The spelling of 23145565 in words is "twenty-three million, one hundred forty-five thousand, five hundred sixty-five".