42231671 has 2 divisors, whose sum is σ = 42231672. Its totient is φ = 42231670.

The previous prime is 42231659. The next prime is 42231677. The reversal of 42231671 is 17613224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42231671 is a prime.

It is a super-3 number, since 3×42231671³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42231671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42231677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21115835 + 21115836.

It is an arithmetic number, because the mean of its divisors is an integer number (21115836).

Almost surely, 2^42231671 is an apocalyptic number.

42231671 is a deficient number, since it is larger than the sum of its proper divisors (1).

42231671 is an equidigital number, since it uses as much as digits as its factorization.

42231671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 42231671 is about 6498.5899239758. The cubic root of 42231671 is about 348.2406156218.

Adding to 42231671 its reverse (17613224), we get a palindrome (59844895).

The spelling of 42231671 in words is "forty-two million, two hundred thirty-one thousand, six hundred seventy-one".