243220204259 has 2 divisors, whose sum is σ = 243220204260. Its totient is φ = 243220204258.

The previous prime is 243220204207. The next prime is 243220204267. The reversal of 243220204259 is 952402022342.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243220204259 is a prime.

It is not a weakly prime, because it can be changed into another prime (243220224259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121610102129 + 121610102130.

It is an arithmetic number, because the mean of its divisors is an integer number (121610102130).

Almost surely, 2^243220204259 is an apocalyptic number.

243220204259 is a deficient number, since it is larger than the sum of its proper divisors (1).

243220204259 is an equidigital number, since it uses as much as digits as its factorization.

243220204259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 243220204259 in words is "two hundred forty-three billion, two hundred twenty million, two hundred four thousand, two hundred fifty-nine".