23163566 has 4 divisors (see below), whose sum is σ = 34745352. Its totient is φ = 11581782.

The previous prime is 23163563. The next prime is 23163587. The reversal of 23163566 is 66536132.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23163563) 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 as a sum of consecutive naturals, namely, 5790890 + ... + 5790893.

It is an arithmetic number, because the mean of its divisors is an integer number (8686338).

Almost surely, 2^23163566 is an apocalyptic number.

23163566 is a deficient number, since it is larger than the sum of its proper divisors (11581786).

23163566 is a wasteful number, since it uses less digits than its factorization.

23163566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11581785.

The product of its digits is 19440, while the sum is 32.

The square root of 23163566 is about 4812.8542467023. The cubic root of 23163566 is about 285.0592510440.

Adding to 23163566 its reverse (66536132), we get a palindrome (89699698).

The spelling of 23163566 in words is "twenty-three million, one hundred sixty-three thousand, five hundred sixty-six".