42343507931 has 2 divisors, whose sum is σ = 42343507932. Its totient is φ = 42343507930.

The previous prime is 42343507907. The next prime is 42343507961. The reversal of 42343507931 is 13970534324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42343507931 is a prime.

It is a super-2 number, since 2×42343507931² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42343507961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171753965 + 21171753966.

It is an arithmetic number, because the mean of its divisors is an integer number (21171753966).

Almost surely, 2^42343507931 is an apocalyptic number.

42343507931 is a deficient number, since it is larger than the sum of its proper divisors (1).

42343507931 is an equidigital number, since it uses as much as digits as its factorization.

42343507931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 42343507931 in words is "forty-two billion, three hundred forty-three million, five hundred seven thousand, nine hundred thirty-one".