3181212 has 36 divisors (see below), whose sum is σ = 8133216. Its totient is φ = 1048320.

The previous prime is 3181207. The next prime is 3181229. The reversal of 3181212 is 2121813.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3037 + ... + 3947.

Almost surely, 2^3181212 is an apocalyptic number.

It is an amenable number.

3181212 is an abundant number, since it is smaller than the sum of its proper divisors (4952004).

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

3181212 is a wasteful number, since it uses less digits than its factorization.

3181212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018 (or 1013 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 3181212 is about 1783.5952455644. The cubic root of 3181212 is about 147.0722954121.

The spelling of 3181212 in words is "three million, one hundred eighty-one thousand, two hundred twelve".