2400000221 has 2 divisors, whose sum is σ = 2400000222. Its totient is φ = 2400000220.

The previous prime is 2400000203. The next prime is 2400000247. The reversal of 2400000221 is 1220000042.

2400000221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2281495225 + 118504996 = 47765^2 + 10886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2400000221 - 2⁶ = 2400000157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2400000121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1200000110 + 1200000111.

It is an arithmetic number, because the mean of its divisors is an integer number (1200000111).

Almost surely, 2^2400000221 is an apocalyptic number.

It is an amenable number.

2400000221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2400000221 is an equidigital number, since it uses as much as digits as its factorization.

2400000221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 2400000221 is about 48989.7971112353. The cubic root of 2400000221 is about 1338.8659412601.

Adding to 2400000221 its reverse (1220000042), we get a palindrome (3620000263).

The spelling of 2400000221 in words is "two billion, four hundred million, two hundred twenty-one", and thus it is an aban number.