331212 has 24 divisors (see below), whose sum is σ = 883456. Its totient is φ = 94608.

The previous prime is 331207. The next prime is 331213. The reversal of 331212 is 212133.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a nude number because it is divisible by every one of its digits.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331212.

It is not an unprimeable number, because it can be changed into a prime (331213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888 + ... + 2055.

2³³¹²¹² is an apocalyptic number.

It is an amenable number.

331212 is an abundant number, since it is smaller than the sum of its proper divisors (552244).

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

331212 is a wasteful number, since it uses less digits than its factorization.

331212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3957 (or 3955 counting only the distinct ones).

The product of its digits is 36, while the sum is 12.

The square root of 331212 is about 575.5102084238. The cubic root of 331212 is about 69.1887292725.

Adding to 331212 its reverse (212133), we get a palindrome (543345).

It can be divided in two parts, 3 and 31212, that multiplied together give a square (93636 = 306²).

The spelling of 331212 in words is "three hundred thirty-one thousand, two hundred twelve".