31220320244089 has 2 divisors, whose sum is σ = 31220320244090. Its totient is φ = 31220320244088.

The previous prime is 31220320244081. The next prime is 31220320244143. The reversal of 31220320244089 is 98044202302213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16937340250000 + 14282979994089 = 4115500^2 + 3779283^2 .

It is a cyclic number.

It is not a de Polignac number, because 31220320244089 - 2³ = 31220320244081 is a prime.

It is a super-2 number, since 2×31220320244089² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31220320244081) 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, 15610160122044 + 15610160122045.

It is an arithmetic number, because the mean of its divisors is an integer number (15610160122045).

Almost surely, 2^{31220320244089} is an apocalyptic number.

It is an amenable number.

31220320244089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31220320244089 is an equidigital number, since it uses as much as digits as its factorization.

31220320244089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 31220320244089 in words is "thirty-one trillion, two hundred twenty billion, three hundred twenty million, two hundred forty-four thousand, eighty-nine".