31331030131312 has 40 divisors (see below), whose sum is σ = 61237027008000. Its totient is φ = 15528148860672.

The previous prime is 31331030131307. The next prime is 31331030131351. The reversal of 31331030131312 is 21313103013313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4698187 + ... + 9205162.

It is an arithmetic number, because the mean of its divisors is an integer number (1530925675200).

Almost surely, 2^{31331030131312} is an apocalyptic number.

It is an amenable number.

31331030131312 is a deficient number, since it is larger than the sum of its proper divisors (29905996876688).

31331030131312 is a wasteful number, since it uses less digits than its factorization.

31331030131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13904593 (or 13904587 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 25.

Adding to 31331030131312 its reverse (21313103013313), we get a palindrome (52644133144625).

The spelling of 31331030131312 in words is "thirty-one trillion, three hundred thirty-one billion, thirty million, one hundred thirty-one thousand, three hundred twelve".