331322077 has 2 divisors, whose sum is σ = 331322078. Its totient is φ = 331322076.

The previous prime is 331322051. The next prime is 331322137. The reversal of 331322077 is 770223133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176916601 + 154405476 = 13301^2 + 12426^2 .

It is an emirp because it is prime and its reverse (770223133) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 331322077 - 2¹¹ = 331320029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331322777) 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, 165661038 + 165661039.

It is an arithmetic number, because the mean of its divisors is an integer number (165661039).

Almost surely, 2^331322077 is an apocalyptic number.

It is an amenable number.

331322077 is a deficient number, since it is larger than the sum of its proper divisors (1).

331322077 is an equidigital number, since it uses as much as digits as its factorization.

331322077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 331322077 is about 18202.2547229732. The cubic root of 331322077 is about 691.9639329048.

The spelling of 331322077 in words is "three hundred thirty-one million, three hundred twenty-two thousand, seventy-seven".