331671 has 4 divisors (see below), whose sum is σ = 442232. Its totient is φ = 221112.

The previous prime is 331663. The next prime is 331691. The reversal of 331671 is 176133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176133 = 3 ⋅58711.

It is not a de Polignac number, because 331671 - 2³ = 331663 is a prime.

It is a super-2 number, since 2×331671² = 220011304482, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 331671.

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 3 ways as a sum of consecutive naturals, for example, 55276 + ... + 55281.

It is an arithmetic number, because the mean of its divisors is an integer number (110558).

2³³¹⁶⁷¹ is an apocalyptic number.

331671 is a deficient number, since it is larger than the sum of its proper divisors (110561).

331671 is a wasteful number, since it uses less digits than its factorization.

331671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110560.

The product of its digits is 378, while the sum is 21.

The square root of 331671 is about 575.9088469541. The cubic root of 331671 is about 69.2206755465.

The spelling of 331671 in words is "three hundred thirty-one thousand, six hundred seventy-one".