31651311142242 has 40 divisors (see below), whose sum is σ = 77369871685392. Its totient is φ = 9591306406200.

The previous prime is 31651311142229. The next prime is 31651311142267. The reversal of 31651311142242 is 24224111315613.

31651311142242 is a `hidden beast` number, since 3 + 1 + 6 + 513 + 1 + 114 + 2 + 24 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 31651311142197 and 31651311142206.

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 19 ways as a sum of consecutive naturals, for example, 8880837484 + ... + 8880841047.

Almost surely, 2^{31651311142242} is an apocalyptic number.

31651311142242 is an abundant number, since it is smaller than the sum of its proper divisors (45718560543150).

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

31651311142242 is a wasteful number, since it uses less digits than its factorization.

31651311142242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17761678556 (or 17761678547 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

Adding to 31651311142242 its reverse (24224111315613), we get a palindrome (55875422457855).

The spelling of 31651311142242 in words is "thirty-one trillion, six hundred fifty-one billion, three hundred eleven million, one hundred forty-two thousand, two hundred forty-two".