31956132 has 48 divisors (see below), whose sum is σ = 81347840. Its totient is φ = 9704448.

The previous prime is 31956109. The next prime is 31956137. The reversal of 31956132 is 23165913.

It is a self number, because there is not a number n which added to its sum of digits gives 31956132.

It is not an unprimeable number, because it can be changed into a prime (31956137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11028 + ... + 13620.

Almost surely, 2^31956132 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 31956132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40673920).

31956132 is an abundant number, since it is smaller than the sum of its proper divisors (49391708).

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

31956132 is a wasteful number, since it uses less digits than its factorization.

31956132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692 (or 2690 counting only the distinct ones).

The product of its digits is 4860, while the sum is 30.

The square root of 31956132 is about 5652.9754996816. The cubic root of 31956132 is about 317.3350688220.

The spelling of 31956132 in words is "thirty-one million, nine hundred fifty-six thousand, one hundred thirty-two".