42317831 has 2 divisors, whose sum is σ = 42317832. Its totient is φ = 42317830.

The previous prime is 42317827. The next prime is 42317857. The reversal of 42317831 is 13871324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42317831 - 2² = 42317827 is a prime.

It is a super-2 number, since 2×42317831² = 3581597641089122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42317794 and 42317803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42310831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21158915 + 21158916.

It is an arithmetic number, because the mean of its divisors is an integer number (21158916).

Almost surely, 2^42317831 is an apocalyptic number.

42317831 is a deficient number, since it is larger than the sum of its proper divisors (1).

42317831 is an equidigital number, since it uses as much as digits as its factorization.

42317831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 29.

The square root of 42317831 is about 6505.2156766705. The cubic root of 42317831 is about 348.4772786843.

The spelling of 42317831 in words is "forty-two million, three hundred seventeen thousand, eight hundred thirty-one".