42431613397 has 2 divisors, whose sum is σ = 42431613398. Its totient is φ = 42431613396.

The previous prime is 42431613391. The next prime is 42431613443. The reversal of 42431613397 is 79331613424.

42431613397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42351170436 + 80442961 = 205794^2 + 8969^2 .

It is a cyclic number.

It is not a de Polignac number, because 42431613397 - 2⁷ = 42431613269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42431613391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215806698 + 21215806699.

It is an arithmetic number, because the mean of its divisors is an integer number (21215806699).

Almost surely, 2^42431613397 is an apocalyptic number.

It is an amenable number.

42431613397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431613397 is an equidigital number, since it uses as much as digits as its factorization.

42431613397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The spelling of 42431613397 in words is "forty-two billion, four hundred thirty-one million, six hundred thirteen thousand, three hundred ninety-seven".