3931213132 has 48 divisors (see below), whose sum is σ = 8584386048. Its totient is φ = 1530357120.

The previous prime is 3931213109. The next prime is 3931213157. The reversal of 3931213132 is 2313121393.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 3931213132.

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, 416368 + ... + 425704.

It is an arithmetic number, because the mean of its divisors is an integer number (178841376).

Almost surely, 2^3931213132 is an apocalyptic number.

It is an amenable number.

3931213132 is an abundant number, since it is smaller than the sum of its proper divisors (4653172916).

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

3931213132 is a wasteful number, since it uses less digits than its factorization.

3931213132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10726 (or 10724 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 3931213132 is about 62699.3870145474. The cubic root of 3931213132 is about 1578.2490259245.

The spelling of 3931213132 in words is "three billion, nine hundred thirty-one million, two hundred thirteen thousand, one hundred thirty-two".