24864221 has 2 divisors, whose sum is σ = 24864222. Its totient is φ = 24864220.

The previous prime is 24864209. The next prime is 24864233. The reversal of 24864221 is 12246842.

It is a balanced prime because it is at equal distance from previous prime (24864209) and next prime (24864233).

It can be written as a sum of positive squares in only one way, i.e., 18156121 + 6708100 = 4261^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 24864221 - 2⁶ = 24864157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24864121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12432110 + 12432111.

It is an arithmetic number, because the mean of its divisors is an integer number (12432111).

Almost surely, 2^24864221 is an apocalyptic number.

It is an amenable number.

24864221 is a deficient number, since it is larger than the sum of its proper divisors (1).

24864221 is an equidigital number, since it uses as much as digits as its factorization.

24864221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 29.

The square root of 24864221 is about 4986.4036138283. The cubic root of 24864221 is about 291.8714522997.

The spelling of 24864221 in words is "twenty-four million, eight hundred sixty-four thousand, two hundred twenty-one".