42422431 has 2 divisors, whose sum is σ = 42422432. Its totient is φ = 42422430.

The previous prime is 42422423. The next prime is 42422453. The reversal of 42422431 is 13422424.

It is a happy number.

42422431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (42422453) can be obtained adding 42422431 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42422431 - 2³ = 42422423 is a prime.

It is a super-2 number, since 2×42422431² = 3599325303899522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42422411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21211215 + 21211216.

It is an arithmetic number, because the mean of its divisors is an integer number (21211216).

Almost surely, 2^42422431 is an apocalyptic number.

42422431 is a deficient number, since it is larger than the sum of its proper divisors (1).

42422431 is an equidigital number, since it uses as much as digits as its factorization.

42422431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 22.

The square root of 42422431 is about 6513.2504174183. The cubic root of 42422431 is about 348.7641611564.

Adding to 42422431 its reverse (13422424), we get a palindrome (55844855).

The spelling of 42422431 in words is "forty-two million, four hundred twenty-two thousand, four hundred thirty-one".