31300220117 has 2 divisors, whose sum is σ = 31300220118. Its totient is φ = 31300220116.

The previous prime is 31300220113. The next prime is 31300220131. The reversal of 31300220117 is 71102200313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19758800356 + 11541419761 = 140566^2 + 107431^2 .

It is a cyclic number.

It is not a de Polignac number, because 31300220117 - 2² = 31300220113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31300220113) 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, 15650110058 + 15650110059.

It is an arithmetic number, because the mean of its divisors is an integer number (15650110059).

Almost surely, 2^31300220117 is an apocalyptic number.

It is an amenable number.

31300220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31300220117 is an equidigital number, since it uses as much as digits as its factorization.

31300220117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The spelling of 31300220117 in words is "thirty-one billion, three hundred million, two hundred twenty thousand, one hundred seventeen".