31696 has 20 divisors (see below), whose sum is σ = 70432. Its totient is φ = 13536.

The previous prime is 31687. The next prime is 31699. The reversal of 31696 is 69613.

It is a self number, because there is not a number n which added to its sum of digits gives 31696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30 + ... + 253.

2³¹⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

31696 is an abundant number, since it is smaller than the sum of its proper divisors (38736).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35216).

31696 is a wasteful number, since it uses less digits than its factorization.

31696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 292 counting only the distinct ones).

The product of its digits is 972, while the sum is 25.

The square root of 31696 is about 178.0337046741. The cubic root of 31696 is about 31.6471655863.

It can be divided in two parts, 31 and 696, that added together give a palindrome (727).

The spelling of 31696 in words is "thirty-one thousand, six hundred ninety-six".