23808221 has 2 divisors, whose sum is σ = 23808222. Its totient is φ = 23808220.

The previous prime is 23808209. The next prime is 23808251. The reversal of 23808221 is 12280832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 7896100 = 3989^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 23808221 - 2¹⁰ = 23807197 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23808251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11904110 + 11904111.

It is an arithmetic number, because the mean of its divisors is an integer number (11904111).

Almost surely, 2^23808221 is an apocalyptic number.

It is an amenable number.

23808221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23808221 is an equidigital number, since it uses as much as digits as its factorization.

23808221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 23808221 is about 4879.3668646659. The cubic root of 23808221 is about 287.6795440579.

It can be divided in two parts, 2380 and 8221, that added together give a palindrome (10601).

The spelling of 23808221 in words is "twenty-three million, eight hundred eight thousand, two hundred twenty-one".