23220163 has 4 divisors (see below), whose sum is σ = 23500008. Its totient is φ = 22940320.

The previous prime is 23220149. The next prime is 23220167. The reversal of 23220163 is 36102232.

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

It is a cyclic number.

It is not a de Polignac number, because 23220163 - 2¹⁷ = 23089091 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23220163.

It is not an unprimeable number, because it can be changed into a prime (23220167) 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 3 ways as a sum of consecutive naturals, for example, 139798 + ... + 139963.

It is an arithmetic number, because the mean of its divisors is an integer number (5875002).

Almost surely, 2^23220163 is an apocalyptic number.

23220163 is a deficient number, since it is larger than the sum of its proper divisors (279845).

23220163 is an equidigital number, since it uses as much as digits as its factorization.

23220163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279844.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 23220163 is about 4818.7304344609. The cubic root of 23220163 is about 285.2912299521.

Adding to 23220163 its reverse (36102232), we get a palindrome (59322395).

The spelling of 23220163 in words is "twenty-three million, two hundred twenty thousand, one hundred sixty-three".