243621436259 has 2 divisors, whose sum is σ = 243621436260. Its totient is φ = 243621436258.

The previous prime is 243621436231. The next prime is 243621436273. The reversal of 243621436259 is 952634126342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243621436259 - 2²⁰ = 243620387683 is a prime.

It is not a weakly prime, because it can be changed into another prime (243621430259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121810718129 + 121810718130.

It is an arithmetic number, because the mean of its divisors is an integer number (121810718130).

Almost surely, 2^243621436259 is an apocalyptic number.

243621436259 is a deficient number, since it is larger than the sum of its proper divisors (1).

243621436259 is an equidigital number, since it uses as much as digits as its factorization.

243621436259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 47.

The spelling of 243621436259 in words is "two hundred forty-three billion, six hundred twenty-one million, four hundred thirty-six thousand, two hundred fifty-nine".