31531334124 has 24 divisors (see below), whose sum is σ = 73582916400. Its totient is φ = 10509044224.

The previous prime is 31531334101. The next prime is 31531334161. The reversal of 31531334124 is 42143313513.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31531334091 and 31531334100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79149 + ... + 263300.

It is an arithmetic number, because the mean of its divisors is an integer number (3065954850).

Almost surely, 2^31531334124 is an apocalyptic number.

It is an amenable number.

31531334124 is an abundant number, since it is smaller than the sum of its proper divisors (42051582276).

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

31531334124 is a wasteful number, since it uses less digits than its factorization.

31531334124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350129 (or 350127 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

Adding to 31531334124 its reverse (42143313513), we get a palindrome (73674647637).

The spelling of 31531334124 in words is "thirty-one billion, five hundred thirty-one million, three hundred thirty-four thousand, one hundred twenty-four".