23208563 has 4 divisors (see below), whose sum is σ = 26524080. Its totient is φ = 19893048.

The previous prime is 23208533. The next prime is 23208569. The reversal of 23208563 is 36580232.

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

It is not a de Polignac number, because 23208563 - 2¹⁰ = 23207539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23208569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657748 + ... + 1657761.

It is an arithmetic number, because the mean of its divisors is an integer number (6631020).

Almost surely, 2^23208563 is an apocalyptic number.

23208563 is a deficient number, since it is larger than the sum of its proper divisors (3315517).

23208563 is an equidigital number, since it uses as much as digits as its factorization.

23208563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315516.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 23208563 is about 4817.5266475651. The cubic root of 23208563 is about 285.2437147889.

Adding to 23208563 its reverse (36580232), we get a palindrome (59788795).

The spelling of 23208563 in words is "twenty-three million, two hundred eight thousand, five hundred sixty-three".