31113030209 has 2 divisors, whose sum is σ = 31113030210. Its totient is φ = 31113030208.

The previous prime is 31113030191. The next prime is 31113030227. The reversal of 31113030209 is 90203031113.

It is a balanced prime because it is at equal distance from previous prime (31113030191) and next prime (31113030227).

It can be written as a sum of positive squares in only one way, i.e., 27011908609 + 4101121600 = 164353^2 + 64040^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113030209 - 2³² = 26818062913 is a prime.

It is a super-2 number, since 2×31113030209² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31113033209) 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, 15556515104 + 15556515105.

It is an arithmetic number, because the mean of its divisors is an integer number (15556515105).

Almost surely, 2^31113030209 is an apocalyptic number.

It is an amenable number.

31113030209 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113030209 is an equidigital number, since it uses as much as digits as its factorization.

31113030209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 31113030209 in words is "thirty-one billion, one hundred thirteen million, thirty thousand, two hundred nine".