331906 has 8 divisors (see below), whose sum is σ = 500544. Its totient is φ = 165060.

The previous prime is 331897. The next prime is 331907. The reversal of 331906 is 609133.

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

It is a super-2 number, since 2×331906² = 220323185672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331907) by changing a digit.

331906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 3 ways as a sum of consecutive naturals, for example, 211 + ... + 841.

It is an arithmetic number, because the mean of its divisors is an integer number (62568).

2³³¹⁹⁰⁶ is an apocalyptic number.

331906 is a deficient number, since it is larger than the sum of its proper divisors (168638).

331906 is a wasteful number, since it uses less digits than its factorization.

331906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 331906 is about 576.1128361701. The cubic root of 331906 is about 69.2370200750.

The spelling of 331906 in words is "three hundred thirty-one thousand, nine hundred six".