31605503132 has 48 divisors (see below), whose sum is σ = 64709299200. Its totient is φ = 13501479600.

The previous prime is 31605503077. The next prime is 31605503147. The reversal of 31605503132 is 23130550613.

It is a junction number, because it is equal to n+sod(n) for n = 31605503095 and 31605503104.

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, 389657 + ... + 463727.

It is an arithmetic number, because the mean of its divisors is an integer number (1348110400).

Almost surely, 2^31605503132 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 31605503132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32354649600).

31605503132 is an abundant number, since it is smaller than the sum of its proper divisors (33103796068).

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

31605503132 is a wasteful number, since it uses less digits than its factorization.

31605503132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74407 (or 74391 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The spelling of 31605503132 in words is "thirty-one billion, six hundred five million, five hundred three thousand, one hundred thirty-two".