331320131 has 2 divisors, whose sum is σ = 331320132. Its totient is φ = 331320130.

The previous prime is 331320127. The next prime is 331320137. The reversal of 331320131 is 131023133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331320131 - 2² = 331320127 is a prime.

It is a super-2 number, since 2×331320131² = 219546058411714322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (331320137) 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 as a sum of consecutive naturals, namely, 165660065 + 165660066.

It is an arithmetic number, because the mean of its divisors is an integer number (165660066).

Almost surely, 2^331320131 is an apocalyptic number.

331320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

331320131 is an equidigital number, since it uses as much as digits as its factorization.

331320131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 331320131 is about 18202.2012679786. The cubic root of 331320131 is about 691.9625781661.

Adding to 331320131 its reverse (131023133), we get a palindrome (462343264).

The spelling of 331320131 in words is "three hundred thirty-one million, three hundred twenty thousand, one hundred thirty-one".