2421725209 has 2 divisors, whose sum is σ = 2421725210. Its totient is φ = 2421725208.

The previous prime is 2421725203. The next prime is 2421725231. The reversal of 2421725209 is 9025271242.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1284147225 + 1137577984 = 35835^2 + 33728^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421725209 - 2¹³ = 2421717017 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421725203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210862604 + 1210862605.

It is an arithmetic number, because the mean of its divisors is an integer number (1210862605).

Almost surely, 2^2421725209 is an apocalyptic number.

It is an amenable number.

2421725209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421725209 is an equidigital number, since it uses as much as digits as its factorization.

2421725209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 2421725209 is about 49211.0273109595. The cubic root of 2421725209 is about 1342.8936519677.

The spelling of 2421725209 in words is "two billion, four hundred twenty-one million, seven hundred twenty-five thousand, two hundred nine".