243112237019 has 2 divisors, whose sum is σ = 243112237020. Its totient is φ = 243112237018.

The previous prime is 243112237009. The next prime is 243112237033. The reversal of 243112237019 is 910732211342.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243112237019 is a prime.

It is a super-3 number, since 3×243112237019³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243112237019.

It is not a weakly prime, because it can be changed into another prime (243112237009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121556118509 + 121556118510.

It is an arithmetic number, because the mean of its divisors is an integer number (121556118510).

Almost surely, 2^243112237019 is an apocalyptic number.

243112237019 is a deficient number, since it is larger than the sum of its proper divisors (1).

243112237019 is an equidigital number, since it uses as much as digits as its factorization.

243112237019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The spelling of 243112237019 in words is "two hundred forty-three billion, one hundred twelve million, two hundred thirty-seven thousand, nineteen".