243121245287 has 2 divisors, whose sum is σ = 243121245288. Its totient is φ = 243121245286.

The previous prime is 243121245281. The next prime is 243121245331. The reversal of 243121245287 is 782542121342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243121245287 - 2¹⁸ = 243120983143 is a prime.

It is a super-3 number, since 3×243121245287³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243121245281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121560622643 + 121560622644.

It is an arithmetic number, because the mean of its divisors is an integer number (121560622644).

Almost surely, 2^243121245287 is an apocalyptic number.

243121245287 is a deficient number, since it is larger than the sum of its proper divisors (1).

243121245287 is an equidigital number, since it uses as much as digits as its factorization.

243121245287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 41.

The spelling of 243121245287 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, two hundred eighty-seven".