243400540351 has 2 divisors, whose sum is σ = 243400540352. Its totient is φ = 243400540350.

The previous prime is 243400540319. The next prime is 243400540363. The reversal of 243400540351 is 153045004342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243400540351 - 2⁵ = 243400540319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243400540381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121700270175 + 121700270176.

It is an arithmetic number, because the mean of its divisors is an integer number (121700270176).

Almost surely, 2^243400540351 is an apocalyptic number.

243400540351 is a deficient number, since it is larger than the sum of its proper divisors (1).

243400540351 is an equidigital number, since it uses as much as digits as its factorization.

243400540351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 243400540351 its reverse (153045004342), we get a palindrome (396445544693).

The spelling of 243400540351 in words is "two hundred forty-three billion, four hundred million, five hundred forty thousand, three hundred fifty-one".