331842 has 16 divisors (see below), whose sum is σ = 758592. Its totient is φ = 94800.

The previous prime is 331841. The next prime is 331843. The reversal of 331842 is 248133.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (331841) and next prime (331843).

It is a super-2 number, since 2×331842² = 220238225928, which contains 22 as substring.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331842.

It is not an unprimeable number, because it can be changed into a prime (331841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3909 + ... + 3992.

It is an arithmetic number, because the mean of its divisors is an integer number (47412).

2³³¹⁸⁴² is an apocalyptic number.

331842 is an abundant number, since it is smaller than the sum of its proper divisors (426750).

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

331842 is a wasteful number, since it uses less digits than its factorization.

331842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913.

The product of its digits is 576, while the sum is 21.

The square root of 331842 is about 576.0572888177. The cubic root of 331842 is about 69.2325695638.

Adding to 331842 its reverse (248133), we get a palindrome (579975).

The spelling of 331842 in words is "three hundred thirty-one thousand, eight hundred forty-two".