31313122207 has 2 divisors, whose sum is σ = 31313122208. Its totient is φ = 31313122206.

The previous prime is 31313122199. The next prime is 31313122229. The reversal of 31313122207 is 70222131313.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31313122207 - 2³ = 31313122199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313123207) 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, 15656561103 + 15656561104.

It is an arithmetic number, because the mean of its divisors is an integer number (15656561104).

Almost surely, 2^31313122207 is an apocalyptic number.

31313122207 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313122207 is an equidigital number, since it uses as much as digits as its factorization.

31313122207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The spelling of 31313122207 in words is "thirty-one billion, three hundred thirteen million, one hundred twenty-two thousand, two hundred seven".