42351311331 has 24 divisors (see below), whose sum is σ = 71539170560. Its totient is φ = 23637939696.

The previous prime is 42351311309. The next prime is 42351311377. The reversal of 42351311331 is 13311315324.

42351311331 is a `hidden beast` number, since 4 + 2 + 3 + 513 + 113 + 31 = 666.

It is not a de Polignac number, because 42351311331 - 2²⁷ = 42217093603 is a prime.

It is a super-2 number, since 2×42351311331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42351311295 and 42351311304.

It is not an unprimeable number, because it can be changed into a prime (42351311531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7814071 + ... + 7819488.

Almost surely, 2^42351311331 is an apocalyptic number.

42351311331 is a deficient number, since it is larger than the sum of its proper divisors (29187859229).

42351311331 is a wasteful number, since it uses less digits than its factorization.

42351311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15633615 (or 15633612 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

Adding to 42351311331 its reverse (13311315324), we get a palindrome (55662626655).

The spelling of 42351311331 in words is "forty-two billion, three hundred fifty-one million, three hundred eleven thousand, three hundred thirty-one".