42841817531 has 2 divisors, whose sum is σ = 42841817532. Its totient is φ = 42841817530.

The previous prime is 42841817507. The next prime is 42841817533. The reversal of 42841817531 is 13571814824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42841817531 - 2⁶ = 42841817467 is a prime.

It is a super-2 number, since 2×42841817531² (a number of 22 digits) contains 22 as substring.

Together with 42841817533, 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 (42841817533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21420908765 + 21420908766.

It is an arithmetic number, because the mean of its divisors is an integer number (21420908766).

Almost surely, 2^42841817531 is an apocalyptic number.

42841817531 is a deficient number, since it is larger than the sum of its proper divisors (1).

42841817531 is an equidigital number, since it uses as much as digits as its factorization.

42841817531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 44.

The spelling of 42841817531 in words is "forty-two billion, eight hundred forty-one million, eight hundred seventeen thousand, five hundred thirty-one".