31313322109 has 2 divisors, whose sum is σ = 31313322110. Its totient is φ = 31313322108.

The previous prime is 31313322071. The next prime is 31313322113. The reversal of 31313322109 is 90122331313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30016602009 + 1296720100 = 173253^2 + 36010^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313322109 - 2¹¹ = 31313320061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313322119) 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, 15656661054 + 15656661055.

It is an arithmetic number, because the mean of its divisors is an integer number (15656661055).

Almost surely, 2^31313322109 is an apocalyptic number.

It is an amenable number.

31313322109 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313322109 is an equidigital number, since it uses as much as digits as its factorization.

31313322109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 31313322109 in words is "thirty-one billion, three hundred thirteen million, three hundred twenty-two thousand, one hundred nine".