331923 has 4 divisors (see below), whose sum is σ = 442568. Its totient is φ = 221280.

The previous prime is 331921. The next prime is 331937. The reversal of 331923 is 329133.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 331923 - 2¹ = 331921 is a prime.

It is a super-2 number, since 2×331923² = 220345755858, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331923.

It is not an unprimeable number, because it can be changed into a prime (331921) 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 3 ways as a sum of consecutive naturals, for example, 55318 + ... + 55323.

It is an arithmetic number, because the mean of its divisors is an integer number (110642).

2³³¹⁹²³ is an apocalyptic number.

331923 is a deficient number, since it is larger than the sum of its proper divisors (110645).

331923 is a wasteful number, since it uses less digits than its factorization.

331923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110644.

The product of its digits is 486, while the sum is 21.

The square root of 331923 is about 576.1275900354. The cubic root of 331923 is about 69.2382021459.

The spelling of 331923 in words is "three hundred thirty-one thousand, nine hundred twenty-three".