23213566 has 8 divisors (see below), whose sum is σ = 34847784. Its totient is φ = 11597640.

The previous prime is 23213539. The next prime is 23213569. The reversal of 23213566 is 66531232.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 765 + ... + 6856.

It is an arithmetic number, because the mean of its divisors is an integer number (4355973).

Almost surely, 2^23213566 is an apocalyptic number.

23213566 is a deficient number, since it is larger than the sum of its proper divisors (11634218).

23213566 is a wasteful number, since it uses less digits than its factorization.

23213566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9146.

The product of its digits is 6480, while the sum is 28.

The square root of 23213566 is about 4818.0458694371. The cubic root of 23213566 is about 285.2642096923.

Adding to 23213566 its reverse (66531232), we get a palindrome (89744798).

The spelling of 23213566 in words is "twenty-three million, two hundred thirteen thousand, five hundred sixty-six".