31321244512 has 24 divisors (see below), whose sum is σ = 62508413016. Its totient is φ = 15446092032.

The previous prime is 31321244491. The next prime is 31321244569. The reversal of 31321244512 is 21544212313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6701698 + ... + 6706369.

It is an arithmetic number, because the mean of its divisors is an integer number (2604517209).

Almost surely, 2^31321244512 is an apocalyptic number.

31321244512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31321244512 is a deficient number, since it is larger than the sum of its proper divisors (31187168504).

31321244512 is a wasteful number, since it uses less digits than its factorization.

31321244512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13408150 (or 13408142 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

Adding to 31321244512 its reverse (21544212313), we get a palindrome (52865456825).

The spelling of 31321244512 in words is "thirty-one billion, three hundred twenty-one million, two hundred forty-four thousand, five hundred twelve".