42321240243 has 24 divisors (see below), whose sum is σ = 64409583680. Its totient is φ = 26703658800.

The previous prime is 42321240233. The next prime is 42321240259. The reversal of 42321240243 is 34204212324.

42321240243 is a `hidden beast` number, since 4 + 2 + 3 + 212 + 402 + 43 = 666.

42321240243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42321240243 - 2¹⁴ = 42321223859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42321240233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61980 + ... + 297462.

Almost surely, 2^42321240243 is an apocalyptic number.

42321240243 is a deficient number, since it is larger than the sum of its proper divisors (22088343437).

42321240243 is a wasteful number, since it uses less digits than its factorization.

42321240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236559 (or 236556 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 42321240243 its reverse (34204212324), we get a palindrome (76525452567).

The spelling of 42321240243 in words is "forty-two billion, three hundred twenty-one million, two hundred forty thousand, two hundred forty-three".