243010340381 has 2 divisors, whose sum is σ = 243010340382. Its totient is φ = 243010340380.

The previous prime is 243010340323. The next prime is 243010340449. The reversal of 243010340381 is 183043010342.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241542760900 + 1467579481 = 491470^2 + 38309^2 .

It is a cyclic number.

It is not a de Polignac number, because 243010340381 - 2¹⁰ = 243010339357 is a prime.

It is a super-2 number, since 2×243010340381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243010340681) 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, 121505170190 + 121505170191.

It is an arithmetic number, because the mean of its divisors is an integer number (121505170191).

Almost surely, 2^243010340381 is an apocalyptic number.

It is an amenable number.

243010340381 is a deficient number, since it is larger than the sum of its proper divisors (1).

243010340381 is an equidigital number, since it uses as much as digits as its factorization.

243010340381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 243010340381 in words is "two hundred forty-three billion, ten million, three hundred forty thousand, three hundred eighty-one".