331646 has 8 divisors (see below), whose sum is σ = 568560. Its totient is φ = 142128.

The previous prime is 331613. The next prime is 331651. The reversal of 331646 is 646133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

331646 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11831 + ... + 11858.

It is an arithmetic number, because the mean of its divisors is an integer number (71070).

2³³¹⁶⁴⁶ is an apocalyptic number.

331646 is a deficient number, since it is larger than the sum of its proper divisors (236914).

331646 is a wasteful number, since it uses less digits than its factorization.

331646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23698.

The product of its digits is 1296, while the sum is 23.

The square root of 331646 is about 575.8871417214. The cubic root of 331646 is about 69.2189363125.

Adding to 331646 its reverse (646133), we get a palindrome (977779).

The spelling of 331646 in words is "three hundred thirty-one thousand, six hundred forty-six".