23819221 has 2 divisors, whose sum is σ = 23819222. Its totient is φ = 23819220.

The previous prime is 23819203. The next prime is 23819239. The reversal of 23819221 is 12291832.

It is a balanced prime because it is at equal distance from previous prime (23819203) and next prime (23819239).

It can be written as a sum of positive squares in only one way, i.e., 12327121 + 11492100 = 3511^2 + 3390^2 .

It is a cyclic number.

It is not a de Polignac number, because 23819221 - 2⁵ = 23819189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23819221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23819251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11909610 + 11909611.

It is an arithmetic number, because the mean of its divisors is an integer number (11909611).

Almost surely, 2^23819221 is an apocalyptic number.

It is an amenable number.

23819221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23819221 is an equidigital number, since it uses as much as digits as its factorization.

23819221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 23819221 is about 4880.4939299214. The cubic root of 23819221 is about 287.7238423103.

The spelling of 23819221 in words is "twenty-three million, eight hundred nineteen thousand, two hundred twenty-one".