243421140422345 has 16 divisors (see below), whose sum is σ = 292643437373760. Its totient is φ = 194378209631424.

The previous prime is 243421140422279. The next prime is 243421140422393. The reversal of 243421140422345 is 543224041124342.

It is a cyclic number.

It is not a de Polignac number, because 243421140422345 - 2¹⁰ = 243421140421321 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209915591 + ... + 211072019.

It is an arithmetic number, because the mean of its divisors is an integer number (18290214835860).

Almost surely, 2^{243421140422345} is an apocalyptic number.

It is an amenable number.

243421140422345 is a deficient number, since it is larger than the sum of its proper divisors (49222296951415).

243421140422345 is a wasteful number, since it uses less digits than its factorization.

243421140422345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233944.

The product of its (nonzero) digits is 737280, while the sum is 41.

Adding to 243421140422345 its reverse (543224041124342), we get a palindrome (786645181546687).

The spelling of 243421140422345 in words is "two hundred forty-three trillion, four hundred twenty-one billion, one hundred forty million, four hundred twenty-two thousand, three hundred forty-five".