331643 has 8 divisors (see below), whose sum is σ = 362208. Its totient is φ = 301824.

The previous prime is 331613. The next prime is 331651. The reversal of 331643 is 346133.

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

It is a cyclic number.

It is not a de Polignac number, because 331643 - 2⁶ = 331579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130 + ... + 1392.

It is an arithmetic number, because the mean of its divisors is an integer number (45276).

2³³¹⁶⁴³ is an apocalyptic number.

331643 is a deficient number, since it is larger than the sum of its proper divisors (30565).

331643 is a wasteful number, since it uses less digits than its factorization.

331643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373.

The product of its digits is 648, while the sum is 20.

The square root of 331643 is about 575.8845370385. The cubic root of 331643 is about 69.2187275986.

Adding to 331643 its reverse (346133), we get a palindrome (677776).

The spelling of 331643 in words is "three hundred thirty-one thousand, six hundred forty-three".