331971 has 8 divisors (see below), whose sum is σ = 445440. Its totient is φ = 219912.

The previous prime is 331967. The next prime is 331973. The reversal of 331971 is 179133.

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

It is not a de Polignac number, because 331971 - 2² = 331967 is a prime.

It is a super-2 number, since 2×331971² = 220409489682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486 + ... + 948.

It is an arithmetic number, because the mean of its divisors is an integer number (55680).

2³³¹⁹⁷¹ is an apocalyptic number.

331971 is a deficient number, since it is larger than the sum of its proper divisors (113469).

331971 is a wasteful number, since it uses less digits than its factorization.

331971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705.

The product of its digits is 567, while the sum is 24.

The square root of 331971 is about 576.1692459686. The cubic root of 331971 is about 69.2415395399.

The spelling of 331971 in words is "three hundred thirty-one thousand, nine hundred seventy-one".