42320113991 has 2 divisors, whose sum is σ = 42320113992. Its totient is φ = 42320113990.

The previous prime is 42320113981. The next prime is 42320114017. The reversal of 42320113991 is 19931102324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42320113991 is a prime.

It is a super-2 number, since 2×42320113991² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42320113981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160056995 + 21160056996.

It is an arithmetic number, because the mean of its divisors is an integer number (21160056996).

Almost surely, 2^42320113991 is an apocalyptic number.

42320113991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42320113991 is an equidigital number, since it uses as much as digits as its factorization.

42320113991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 42320113991 in words is "forty-two billion, three hundred twenty million, one hundred thirteen thousand, nine hundred ninety-one".