243211033969 has 2 divisors, whose sum is σ = 243211033970. Its totient is φ = 243211033968.

The previous prime is 243211033937. The next prime is 243211033981. The reversal of 243211033969 is 969330112342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144419000625 + 98792033344 = 380025^2 + 314312^2 .

It is a cyclic number.

It is not a de Polignac number, because 243211033969 - 2⁵ = 243211033937 is a prime.

It is a super-2 number, since 2×243211033969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243211033909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121605516984 + 121605516985.

It is an arithmetic number, because the mean of its divisors is an integer number (121605516985).

Almost surely, 2^243211033969 is an apocalyptic number.

It is an amenable number.

243211033969 is a deficient number, since it is larger than the sum of its proper divisors (1).

243211033969 is an equidigital number, since it uses as much as digits as its factorization.

243211033969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 43.

The spelling of 243211033969 in words is "two hundred forty-three billion, two hundred eleven million, thirty-three thousand, nine hundred sixty-nine".