31442142324 has 24 divisors (see below), whose sum is σ = 77226315040. Its totient is φ = 9929097504.

The previous prime is 31442142323. The next prime is 31442142331. The reversal of 31442142324 is 42324124413.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31442142291 and 31442142300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31442142323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68951839 + ... + 68952294.

Almost surely, 2^31442142324 is an apocalyptic number.

It is an amenable number.

31442142324 is an abundant number, since it is smaller than the sum of its proper divisors (45784172716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31442142324 is a wasteful number, since it uses less digits than its factorization.

31442142324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137904159 (or 137904157 counting only the distinct ones).

The product of its digits is 18432, while the sum is 30.

Adding to 31442142324 its reverse (42324124413), we get a palindrome (73766266737).

The spelling of 31442142324 in words is "thirty-one billion, four hundred forty-two million, one hundred forty-two thousand, three hundred twenty-four".