31043936 has 96 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 11773440.

The previous prime is 31043917. The next prime is 31043941. The reversal of 31043936 is 63934013.

It is a junction number, because it is equal to n+sod(n) for n = 31043899 and 31043908.

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, 105806 + ... + 106098.

It is an arithmetic number, because the mean of its divisors is an integer number (814968).

Almost surely, 2^31043936 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 31043936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39118464).

31043936 is an abundant number, since it is smaller than the sum of its proper divisors (47192992).

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

31043936 is a wasteful number, since it uses less digits than its factorization.

31043936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 31043936 is about 5571.7085350905. The cubic root of 31043936 is about 314.2864034617.

Adding to 31043936 its reverse (63934013), we get a palindrome (94977949).

The spelling of 31043936 in words is "thirty-one million, forty-three thousand, nine hundred thirty-six".