31371517032 has 128 divisors (see below), whose sum is σ = 81135250560. Its totient is φ = 10101985280.

The previous prime is 31371517031. The next prime is 31371517039. The reversal of 31371517032 is 23071517313.

It is a junction number, because it is equal to n+sod(n) for n = 31371516984 and 31371517002.

It is not an unprimeable number, because it can be changed into a prime (31371517031) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 67176463 + ... + 67176929.

It is an arithmetic number, because the mean of its divisors is an integer number (633869145).

Almost surely, 2^31371517032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31371517032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40567625280).

31371517032 is an abundant number, since it is smaller than the sum of its proper divisors (49763733528).

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

31371517032 is a wasteful number, since it uses less digits than its factorization.

31371517032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1039 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 33.

The spelling of 31371517032 in words is "thirty-one billion, three hundred seventy-one million, five hundred seventeen thousand, thirty-two".