31681015950 has 48 divisors (see below), whose sum is σ = 78794175600. Its totient is φ = 8424049920.

The previous prime is 31681015939. The next prime is 31681015963. The reversal of 31681015950 is 5951018613.

It is a junction number, because it is equal to n+sod(n) for n = 31681015899 and 31681015908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250239 + ... + 354938.

It is an arithmetic number, because the mean of its divisors is an integer number (1641545325).

Almost surely, 2^31681015950 is an apocalyptic number.

31681015950 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31681015950 is an abundant number, since it is smaller than the sum of its proper divisors (47113159650).

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

31681015950 is a wasteful number, since it uses less digits than its factorization.

31681015950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605541 (or 605536 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 31681015950 in words is "thirty-one billion, six hundred eighty-one million, fifteen thousand, nine hundred fifty".