42471431 has 2 divisors, whose sum is σ = 42471432. Its totient is φ = 42471430.

The previous prime is 42471413. The next prime is 42471437. The reversal of 42471431 is 13417424.

Together with previous prime (42471413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42471431 is a prime.

It is a super-2 number, since 2×42471431² = 3607644902375522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42471431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42471437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21235715 + 21235716.

It is an arithmetic number, because the mean of its divisors is an integer number (21235716).

Almost surely, 2^42471431 is an apocalyptic number.

42471431 is a deficient number, since it is larger than the sum of its proper divisors (1).

42471431 is an equidigital number, since it uses as much as digits as its factorization.

42471431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 26.

The square root of 42471431 is about 6517.0108945743. The cubic root of 42471431 is about 348.8983894250.

Adding to 42471431 its reverse (13417424), we get a palindrome (55888855).

The spelling of 42471431 in words is "forty-two million, four hundred seventy-one thousand, four hundred thirty-one".