42445131 has 8 divisors (see below), whose sum is σ = 57552960. Its totient is φ = 27817032.

The previous prime is 42445093. The next prime is 42445153. The reversal of 42445131 is 13154424.

42445131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42445131 - 2⁷ = 42445003 is a prime.

It is a super-2 number, since 2×42445131² = 3603178291214322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42447131) 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, 119725 + ... + 120078.

It is an arithmetic number, because the mean of its divisors is an integer number (7194120).

Almost surely, 2^42445131 is an apocalyptic number.

42445131 is a deficient number, since it is larger than the sum of its proper divisors (15107829).

42445131 is a wasteful number, since it uses less digits than its factorization.

42445131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239865.

The product of its digits is 1920, while the sum is 24.

The square root of 42445131 is about 6514.9927858747. The cubic root of 42445131 is about 348.8263572995.

Adding to 42445131 its reverse (13154424), we get a palindrome (55599555).

The spelling of 42445131 in words is "forty-two million, four hundred forty-five thousand, one hundred thirty-one".