23145566 has 16 divisors (see below), whose sum is σ = 35728560. Its totient is φ = 11238720.

The previous prime is 23145547. The next prime is 23145569. The reversal of 23145566 is 66554132.

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, 22205 + ... + 23223.

It is an arithmetic number, because the mean of its divisors is an integer number (2233035).

Almost surely, 2^23145566 is an apocalyptic number.

23145566 is a deficient number, since it is larger than the sum of its proper divisors (12582994).

23145566 is a wasteful number, since it uses less digits than its factorization.

23145566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339.

The product of its digits is 21600, while the sum is 32.

The square root of 23145566 is about 4810.9838910560. The cubic root of 23145566 is about 284.9853937318.

Adding to 23145566 its reverse (66554132), we get a palindrome (89699698).

The spelling of 23145566 in words is "twenty-three million, one hundred forty-five thousand, five hundred sixty-six".