31538322168 has 16 divisors (see below), whose sum is σ = 78845805480. Its totient is φ = 10512774048.

The previous prime is 31538322149. The next prime is 31538322187. The reversal of 31538322168 is 86122383513.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (31538322149) and next prime (31538322187).

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, 657048355 + ... + 657048402.

Almost surely, 2^31538322168 is an apocalyptic number.

It is an amenable number.

31538322168 is an abundant number, since it is smaller than the sum of its proper divisors (47307483312).

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

31538322168 is a wasteful number, since it uses less digits than its factorization.

31538322168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314096766 (or 1314096762 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The spelling of 31538322168 in words is "thirty-one billion, five hundred thirty-eight million, three hundred twenty-two thousand, one hundred sixty-eight".