331131612 has 36 divisors (see below), whose sum is σ = 898787400. Its totient is φ = 94608864.

The previous prime is 331131589. The next prime is 331131613. The reversal of 331131612 is 216131133.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331131613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280987 + ... + 282162.

Almost surely, 2^331131612 is an apocalyptic number.

It is an amenable number.

331131612 is an abundant number, since it is smaller than the sum of its proper divisors (567655788).

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

331131612 is a wasteful number, since it uses less digits than its factorization.

331131612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563170 (or 563161 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 331131612 is about 18197.0220640631. The cubic root of 331131612 is about 691.8313125308.

Adding to 331131612 its reverse (216131133), we get a palindrome (547262745).

The spelling of 331131612 in words is "three hundred thirty-one million, one hundred thirty-one thousand, six hundred twelve".