42440131 has 8 divisors (see below), whose sum is σ = 42989760. Its totient is φ = 41893632.

The previous prime is 42440113. The next prime is 42440149. The reversal of 42440131 is 13104424.

42440131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (42440113) and next prime (42440149).

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

It is a cyclic number.

It is not a de Polignac number, because 42440131 - 2¹⁵ = 42407363 is a prime.

It is a super-2 number, since 2×42440131² = 3602329438594322, 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 = 42440099 and 42440108.

It is not an unprimeable number, because it can be changed into a prime (42440161) 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 in 7 ways as a sum of consecutive naturals, for example, 37926 + ... + 39028.

It is an arithmetic number, because the mean of its divisors is an integer number (5373720).

Almost surely, 2^42440131 is an apocalyptic number.

42440131 is a deficient number, since it is larger than the sum of its proper divisors (549629).

42440131 is a wasteful number, since it uses less digits than its factorization.

42440131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565.

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

The square root of 42440131 is about 6514.6090442942. The cubic root of 42440131 is about 348.8126596131.

Adding to 42440131 its reverse (13104424), we get a palindrome (55544555).

The spelling of 42440131 in words is "forty-two million, four hundred forty thousand, one hundred thirty-one".