42223231 has 2 divisors, whose sum is σ = 42223232. Its totient is φ = 42223230.

The previous prime is 42223229. The next prime is 42223261. The reversal of 42223231 is 13232224.

42223231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42223231 - 2¹ = 42223229 is a prime.

It is a super-2 number, since 2×42223231² = 3565602472158722, which contains 22 as substring.

Together with 42223229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 42223199 and 42223208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42223201) 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, 21111615 + 21111616.

It is an arithmetic number, because the mean of its divisors is an integer number (21111616).

Almost surely, 2^42223231 is an apocalyptic number.

42223231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42223231 is an equidigital number, since it uses as much as digits as its factorization.

42223231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 19.

The square root of 42223231 is about 6497.9405198878. The cubic root of 42223231 is about 348.2174154456.

Adding to 42223231 its reverse (13232224), we get a palindrome (55455455).

It can be divided in two parts, 422 and 23231, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 42223231 in words is "forty-two million, two hundred twenty-three thousand, two hundred thirty-one".