331322131 has 4 divisors (see below), whose sum is σ = 378653872. Its totient is φ = 283990392.

The previous prime is 331322077. The next prime is 331322137. The reversal of 331322131 is 131223133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131223133 = 103 ⋅1274011.

It is a de Polignac number, because none of the positive numbers 2^k-331322131 is a prime.

It is a super-2 number, since 2×331322131² = 219548708980762322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331322099 and 331322108.

It is not an unprimeable number, because it can be changed into a prime (331322137) 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, 23665860 + ... + 23665873.

It is an arithmetic number, because the mean of its divisors is an integer number (94663468).

Almost surely, 2^331322131 is an apocalyptic number.

331322131 is a deficient number, since it is larger than the sum of its proper divisors (47331741).

331322131 is an equidigital number, since it uses as much as digits as its factorization.

331322131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47331740.

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

The square root of 331322131 is about 18202.2562063059. The cubic root of 331322131 is about 691.9639704976.

Adding to 331322131 its reverse (131223133), we get a palindrome (462545264).

The spelling of 331322131 in words is "three hundred thirty-one million, three hundred twenty-two thousand, one hundred thirty-one".