42422131 has 4 divisors (see below), whose sum is σ = 42959200. Its totient is φ = 41885064.

The previous prime is 42422129. The next prime is 42422137. The reversal of 42422131 is 13122424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42422131 - 2¹ = 42422129 is a prime.

It is a super-3 number, since 3×42422131³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42422099 and 42422108.

It is not an unprimeable number, because it can be changed into a prime (42422137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268416 + ... + 268573.

It is an arithmetic number, because the mean of its divisors is an integer number (10739800).

Almost surely, 2^42422131 is an apocalyptic number.

42422131 is a deficient number, since it is larger than the sum of its proper divisors (537069).

42422131 is an equidigital number, since it uses as much as digits as its factorization.

42422131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537068.

The product of its digits is 384, while the sum is 19.

The square root of 42422131 is about 6513.2273874017. The cubic root of 42422131 is about 348.7633390324.

Adding to 42422131 its reverse (13122424), we get a palindrome (55544555).

The spelling of 42422131 in words is "forty-two million, four hundred twenty-two thousand, one hundred thirty-one".