331146 has 12 divisors (see below), whose sum is σ = 717522. Its totient is φ = 110376.

The previous prime is 331141. The next prime is 331147. The reversal of 331146 is 641133.

331146 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 216225 + 114921 = 465^2 + 339^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 18397 = 331146 / (3 + 3 + 1 + 1 + 4 + 6).

It is an Ulam number.

It is a nialpdrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331146.

It is not an unprimeable number, because it can be changed into a prime (331141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9181 + ... + 9216.

2³³¹¹⁴⁶ is an apocalyptic number.

331146 is an abundant number, since it is smaller than the sum of its proper divisors (386376).

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

331146 is a wasteful number, since it uses less digits than its factorization.

331146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18405 (or 18402 counting only the distinct ones).

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

The square root of 331146 is about 575.4528651419. The cubic root of 331146 is about 69.1841332640.

Adding to 331146 its reverse (641133), we get a palindrome (972279).

The spelling of 331146 in words is "three hundred thirty-one thousand, one hundred forty-six".