331331323 has 4 divisors (see below), whose sum is σ = 332314840. Its totient is φ = 330347808.

The previous prime is 331331311. The next prime is 331331347. The reversal of 331331323 is 323133133.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331331323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331331294 and 331331303.

It is not an unprimeable number, because it can be changed into a prime (331331423) 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, 491253 + ... + 491926.

It is an arithmetic number, because the mean of its divisors is an integer number (83078710).

Almost surely, 2^331331323 is an apocalyptic number.

331331323 is a deficient number, since it is larger than the sum of its proper divisors (983517).

331331323 is an equidigital number, since it uses as much as digits as its factorization.

331331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983516.

The product of its digits is 1458, while the sum is 22.

The square root of 331331323 is about 18202.5087007258. The cubic root of 331331323 is about 691.9703695812.

Adding to 331331323 its reverse (323133133), we get a palindrome (654464456).

The spelling of 331331323 in words is "three hundred thirty-one million, three hundred thirty-one thousand, three hundred twenty-three".