42135231043 has 4 divisors (see below), whose sum is σ = 42135994768. Its totient is φ = 42134467320.

The previous prime is 42135231023. The next prime is 42135231053. The reversal of 42135231043 is 34013253124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42135231043 - 2⁵ = 42135231011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42135231023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292068 + ... + 411793.

It is an arithmetic number, because the mean of its divisors is an integer number (10533998692).

Almost surely, 2^42135231043 is an apocalyptic number.

42135231043 is a deficient number, since it is larger than the sum of its proper divisors (763725).

42135231043 is an equidigital number, since it uses as much as digits as its factorization.

42135231043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763724.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 42135231043 its reverse (34013253124), we get a palindrome (76148484167).

The spelling of 42135231043 in words is "forty-two billion, one hundred thirty-five million, two hundred thirty-one thousand, forty-three".