331330243 has 4 divisors (see below), whose sum is σ = 334370080. Its totient is φ = 328290408.

The previous prime is 331330231. The next prime is 331330247. The reversal of 331330243 is 342033133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342033133 = 13 ⋅26310241.

It is a cyclic number.

It is not a de Polignac number, because 331330243 - 2¹³ = 331322051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331330247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519755 + ... + 1519972.

It is an arithmetic number, because the mean of its divisors is an integer number (83592520).

Almost surely, 2^331330243 is an apocalyptic number.

331330243 is a deficient number, since it is larger than the sum of its proper divisors (3039837).

331330243 is a wasteful number, since it uses less digits than its factorization.

331330243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3039836.

The product of its (nonzero) digits is 1944, while the sum is 22.

The square root of 331330243 is about 18202.4790344612. The cubic root of 331330243 is about 691.9696177368.

Adding to 331330243 its reverse (342033133), we get a palindrome (673363376).

The spelling of 331330243 in words is "three hundred thirty-one million, three hundred thirty thousand, two hundred forty-three".