31031440521032 has 64 divisors (see below), whose sum is σ = 68157944951040. Its totient is φ = 12967170969600.

The previous prime is 31031440521023. The next prime is 31031440521071. The reversal of 31031440521032 is 23012504413013.

It is a junction number, because it is equal to n+sod(n) for n = 31031440520986 and 31031440521004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85844 + ... + 7878467.

It is an arithmetic number, because the mean of its divisors is an integer number (1064967889860).

Almost surely, 2^{31031440521032} 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 31031440521032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34078972475520).

31031440521032 is an abundant number, since it is smaller than the sum of its proper divisors (37126504430008).

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

31031440521032 is a wasteful number, since it uses less digits than its factorization.

31031440521032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7966062 (or 7966058 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 31031440521032 its reverse (23012504413013), we get a palindrome (54043944934045).

The spelling of 31031440521032 in words is "thirty-one trillion, thirty-one billion, four hundred forty million, five hundred twenty-one thousand, thirty-two".