331332139 has 2 divisors, whose sum is σ = 331332140. Its totient is φ = 331332138.

The previous prime is 331332121. The next prime is 331332161. The reversal of 331332139 is 931233133.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 331332139 - 2⁵ = 331332107 is a prime.

It is not a weakly prime, because it can be changed into another prime (331332119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165666069 + 165666070.

It is an arithmetic number, because the mean of its divisors is an integer number (165666070).

Almost surely, 2^331332139 is an apocalyptic number.

331332139 is a deficient number, since it is larger than the sum of its proper divisors (1).

331332139 is an equidigital number, since it uses as much as digits as its factorization.

331332139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 28.

The square root of 331332139 is about 18202.5311152048. The cubic root of 331332139 is about 691.9709376403.

The spelling of 331332139 in words is "three hundred thirty-one million, three hundred thirty-two thousand, one hundred thirty-nine".