31243034212 has 24 divisors (see below), whose sum is σ = 59049851000. Its totient is φ = 14378535936.

The previous prime is 31243034189. The next prime is 31243034233. The reversal of 31243034212 is 21243034213.

It can be written as a sum of positive squares in 4 ways, for example, as 12979133476 + 18263900736 = 113926^2 + 135144^2 .

It is a super-2 number, since 2×31243034212² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 842637 + ... + 878932.

Almost surely, 2^31243034212 is an apocalyptic number.

It is an amenable number.

31243034212 is a deficient number, since it is larger than the sum of its proper divisors (27806816788).

31243034212 is a wasteful number, since it uses less digits than its factorization.

31243034212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721935 (or 1721933 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31243034212 its reverse (21243034213), we get a palindrome (52486068425).

Subtracting from 31243034212 its reverse (21243034213), we obtain a palindrome (9999999999).

The spelling of 31243034212 in words is "thirty-one billion, two hundred forty-three million, thirty-four thousand, two hundred twelve".