331641 has 16 divisors (see below), whose sum is σ = 501120. Its totient is φ = 216720.

The previous prime is 331613. The next prime is 331651. The reversal of 331641 is 146133.

It is not a de Polignac number, because 331641 - 2⁵ = 331609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (331651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1831 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (31320).

2³³¹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

331641 is a deficient number, since it is larger than the sum of its proper divisors (169479).

331641 is a wasteful number, since it uses less digits than its factorization.

331641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 247 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 331641 is about 575.8828005766. The cubic root of 331641 is about 69.2185884553.

Adding to 331641 its reverse (146133), we get a palindrome (477774).

The spelling of 331641 in words is "three hundred thirty-one thousand, six hundred forty-one".