331243 has 4 divisors (see below), whose sum is σ = 361368. Its totient is φ = 301120.

The previous prime is 331241. The next prime is 331249. The reversal of 331243 is 342133.

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

It is a cyclic number.

It is not a de Polignac number, because 331243 - 2¹ = 331241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331241) 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 3 ways as a sum of consecutive naturals, for example, 15046 + ... + 15067.

It is an arithmetic number, because the mean of its divisors is an integer number (90342).

2³³¹²⁴³ is an apocalyptic number.

331243 is a deficient number, since it is larger than the sum of its proper divisors (30125).

331243 is a wasteful number, since it uses less digits than its factorization.

331243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30124.

The product of its digits is 216, while the sum is 16.

The square root of 331243 is about 575.5371404175. The cubic root of 331243 is about 69.1908877930.

Adding to 331243 its reverse (342133), we get a palindrome (673376).

The spelling of 331243 in words is "three hundred thirty-one thousand, two hundred forty-three".