42440420331 has 6 divisors (see below), whose sum is σ = 61302829380. Its totient is φ = 28293613548.

The previous prime is 42440420299. The next prime is 42440420339. The reversal of 42440420331 is 13302404424.

It is a happy number.

42440420331 is a `hidden beast` number, since 4 + 24 + 404 + 203 + 31 = 666.

It is not a de Polignac number, because 42440420331 - 2⁵ = 42440420299 is a prime.

It is a super-2 number, since 2×42440420331² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42440420295 and 42440420304.

It is not an unprimeable number, because it can be changed into a prime (42440420339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2357801121 + ... + 2357801138.

It is an arithmetic number, because the mean of its divisors is an integer number (10217138230).

Almost surely, 2^42440420331 is an apocalyptic number.

42440420331 is a deficient number, since it is larger than the sum of its proper divisors (18862409049).

42440420331 is a wasteful number, since it uses less digits than its factorization.

42440420331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4715602265 (or 4715602262 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 42440420331 its reverse (13302404424), we get a palindrome (55742824755).

The spelling of 42440420331 in words is "forty-two billion, four hundred forty million, four hundred twenty thousand, three hundred thirty-one".