681322331 has 2 divisors, whose sum is σ = 681322332. Its totient is φ = 681322330.

The previous prime is 681322283. The next prime is 681322351. The reversal of 681322331 is 133223186.

681322331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681322331 is a prime.

It is a super-2 number, since 2×681322331² = 928400237438547122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 681322294 and 681322303.

It is not a weakly prime, because it can be changed into another prime (681322351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340661165 + 340661166.

It is an arithmetic number, because the mean of its divisors is an integer number (340661166).

Almost surely, 2^681322331 is an apocalyptic number.

681322331 is a deficient number, since it is larger than the sum of its proper divisors (1).

681322331 is an equidigital number, since it uses as much as digits as its factorization.

681322331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 681322331 is about 26102.1518461601. The cubic root of 681322331 is about 879.9355716432.

The spelling of 681322331 in words is "six hundred eighty-one million, three hundred twenty-two thousand, three hundred thirty-one".