331731606 has 16 divisors (see below), whose sum is σ = 673366464. Its totient is φ = 108926664.

The previous prime is 331731601. The next prime is 331731623. The reversal of 331731606 is 606137133.

331731606 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×331731606² = 220091716838678472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331731601) 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, 412200 + ... + 413003.

It is an arithmetic number, because the mean of its divisors is an integer number (42085404).

Almost surely, 2^331731606 is an apocalyptic number.

331731606 is an abundant number, since it is smaller than the sum of its proper divisors (341634858).

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

331731606 is a wasteful number, since it uses less digits than its factorization.

331731606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825275.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 331731606 is about 18213.5006519889. The cubic root of 331731606 is about 692.2489150422.

Adding to 331731606 its reverse (606137133), we get a palindrome (937868739).

The spelling of 331731606 in words is "three hundred thirty-one million, seven hundred thirty-one thousand, six hundred six".