42351431671 has 2 divisors, whose sum is σ = 42351431672. Its totient is φ = 42351431670.

The previous prime is 42351431657. The next prime is 42351431719. The reversal of 42351431671 is 17613415324.

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-42351431671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42351431671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42351431651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21175715835 + 21175715836.

It is an arithmetic number, because the mean of its divisors is an integer number (21175715836).

Almost surely, 2^42351431671 is an apocalyptic number.

42351431671 is a deficient number, since it is larger than the sum of its proper divisors (1).

42351431671 is an equidigital number, since it uses as much as digits as its factorization.

42351431671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

Adding to 42351431671 its reverse (17613415324), we get a palindrome (59964846995).

The spelling of 42351431671 in words is "forty-two billion, three hundred fifty-one million, four hundred thirty-one thousand, six hundred seventy-one".