23648221 has 2 divisors, whose sum is σ = 23648222. Its totient is φ = 23648220.

The previous prime is 23648213. The next prime is 23648231. The reversal of 23648221 is 12284632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17522596 + 6125625 = 4186^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 23648221 - 2³ = 23648213 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23648221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23648231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11824110 + 11824111.

It is an arithmetic number, because the mean of its divisors is an integer number (11824111).

Almost surely, 2^23648221 is an apocalyptic number.

It is an amenable number.

23648221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23648221 is an equidigital number, since it uses as much as digits as its factorization.

23648221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 28.

The square root of 23648221 is about 4862.9436558529. The cubic root of 23648221 is about 287.0336575839.

It can be divided in two parts, 2364 and 8221, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 23648221 in words is "twenty-three million, six hundred forty-eight thousand, two hundred twenty-one".