42223431 has 8 divisors (see below), whose sum is σ = 56332144. Its totient is φ = 28131840.

The previous prime is 42223429. The next prime is 42223513. The reversal of 42223431 is 13432224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42223431 - 2¹ = 42223429 is a prime.

It is a super-2 number, since 2×42223431² = 3565636250823522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42223398 and 42223407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42223231) 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 in 7 ways as a sum of consecutive naturals, for example, 3495 + ... + 9831.

It is an arithmetic number, because the mean of its divisors is an integer number (7041518).

Almost surely, 2^42223431 is an apocalyptic number.

42223431 is a deficient number, since it is larger than the sum of its proper divisors (14108713).

42223431 is a wasteful number, since it uses less digits than its factorization.

42223431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561.

The product of its digits is 1152, while the sum is 21.

The square root of 42223431 is about 6497.9559093610. The cubic root of 42223431 is about 348.2179652486.

Adding to 42223431 its reverse (13432224), we get a palindrome (55655655).

The spelling of 42223431 in words is "forty-two million, two hundred twenty-three thousand, four hundred thirty-one".