331131223 has 4 divisors (see below), whose sum is σ = 331419568. Its totient is φ = 330842880.

The previous prime is 331131217. The next prime is 331131271. The reversal of 331131223 is 322131133.

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 331131223 - 2⁹ = 331130711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331131223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142443 + ... + 144748.

It is an arithmetic number, because the mean of its divisors is an integer number (82854892).

Almost surely, 2^331131223 is an apocalyptic number.

331131223 is a deficient number, since it is larger than the sum of its proper divisors (288345).

331131223 is a wasteful number, since it uses less digits than its factorization.

331131223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288344.

The product of its digits is 324, while the sum is 19.

The square root of 331131223 is about 18197.0113754979. The cubic root of 331131223 is about 691.8310416189.

Adding to 331131223 its reverse (322131133), we get a palindrome (653262356).

The spelling of 331131223 in words is "three hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-three".