331623 has 6 divisors (see below), whose sum is σ = 479024. Its totient is φ = 221076.

The previous prime is 331613. The next prime is 331651. The reversal of 331623 is 326133.

It is a happy number.

It is not a de Polignac number, because 331623 - 2⁸ = 331367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331596 and 331605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331603) 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 5 ways as a sum of consecutive naturals, for example, 18415 + ... + 18432.

2³³¹⁶²³ is an apocalyptic number.

331623 is a deficient number, since it is larger than the sum of its proper divisors (147401).

331623 is a wasteful number, since it uses less digits than its factorization.

331623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36853 (or 36850 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 331623 is about 575.8671721847. The cubic root of 331623 is about 69.2173361401.

Adding to 331623 its reverse (326133), we get a palindrome (657756).

It can be divided in two parts, 3 and 31623, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 331623 in words is "three hundred thirty-one thousand, six hundred twenty-three".