243010340681 has 2 divisors, whose sum is σ = 243010340682. Its totient is φ = 243010340680.

The previous prime is 243010340641. The next prime is 243010340687. The reversal of 243010340681 is 186043010342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226686445456 + 16323895225 = 476116^2 + 127765^2 .

It is a cyclic number.

It is not a de Polignac number, because 243010340681 - 2¹⁸ = 243010078537 is a prime.

It is a super-2 number, since 2×243010340681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243010340687) 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, 121505170340 + 121505170341.

It is an arithmetic number, because the mean of its divisors is an integer number (121505170341).

Almost surely, 2^243010340681 is an apocalyptic number.

It is an amenable number.

243010340681 is a deficient number, since it is larger than the sum of its proper divisors (1).

243010340681 is an equidigital number, since it uses as much as digits as its factorization.

243010340681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 243010340681 in words is "two hundred forty-three billion, ten million, three hundred forty thousand, six hundred eighty-one".