31163331380 has 48 divisors (see below), whose sum is σ = 69314688576. Its totient is φ = 11728335360.

The previous prime is 31163331379. The next prime is 31163331421. The reversal of 31163331380 is 8313336113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1201307 + ... + 1226973.

It is an arithmetic number, because the mean of its divisors is an integer number (1444056012).

Almost surely, 2^31163331380 is an apocalyptic number.

It is an amenable number.

31163331380 is an abundant number, since it is smaller than the sum of its proper divisors (38151357196).

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

31163331380 is a wasteful number, since it uses less digits than its factorization.

31163331380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29264 (or 29262 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 32.

Adding to 31163331380 its reverse (8313336113), we get a palindrome (39476667493).

The spelling of 31163331380 in words is "thirty-one billion, one hundred sixty-three million, three hundred thirty-one thousand, three hundred eighty".