42312440243 has 4 divisors (see below), whose sum is σ = 42312942480. Its totient is φ = 42311938008.

The previous prime is 42312440239. The next prime is 42312440251. The reversal of 42312440243 is 34204421324.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42312440243 - 2² = 42312440239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42312440213) 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 in 3 ways as a sum of consecutive naturals, for example, 90503 + ... + 304656.

It is an arithmetic number, because the mean of its divisors is an integer number (10578235620).

Almost surely, 2^42312440243 is an apocalyptic number.

42312440243 is a deficient number, since it is larger than the sum of its proper divisors (502237).

42312440243 is a wasteful number, since it uses less digits than its factorization.

42312440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502236.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42312440243 its reverse (34204421324), we get a palindrome (76516861567).

The spelling of 42312440243 in words is "forty-two billion, three hundred twelve million, four hundred forty thousand, two hundred forty-three".