42165634331 has 2 divisors, whose sum is σ = 42165634332. Its totient is φ = 42165634330.

The previous prime is 42165634297. The next prime is 42165634333. The reversal of 42165634331 is 13343656124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42165634331 - 2⁶ = 42165634267 is a prime.

It is a super-2 number, since 2×42165634331² (a number of 22 digits) contains 22 as substring.

Together with 42165634333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42165634333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21082817165 + 21082817166.

It is an arithmetic number, because the mean of its divisors is an integer number (21082817166).

Almost surely, 2^42165634331 is an apocalyptic number.

42165634331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42165634331 is an equidigital number, since it uses as much as digits as its factorization.

42165634331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 38.

The spelling of 42165634331 in words is "forty-two billion, one hundred sixty-five million, six hundred thirty-four thousand, three hundred thirty-one".