331630 has 16 divisors (see below), whose sum is σ = 643104. Its totient is φ = 122400.

The previous prime is 331613. The next prime is 331651. The reversal of 331630 is 36133.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

331630 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146 + ... + 1405.

It is an arithmetic number, because the mean of its divisors is an integer number (40194).

2³³¹⁶³⁰ is an apocalyptic number.

331630 is a deficient number, since it is larger than the sum of its proper divisors (311474).

331630 is a wasteful number, since it uses less digits than its factorization.

331630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 331630 is about 575.8732499431. The cubic root of 331630 is about 69.2178231570.

Adding to 331630 its reverse (36133), we get a palindrome (367763).

It can be divided in two parts, 331 and 630, that added together give a square (961 = 31²).

The spelling of 331630 in words is "three hundred thirty-one thousand, six hundred thirty".