31222556489 has 2 divisors, whose sum is σ = 31222556490. Its totient is φ = 31222556488.

The previous prime is 31222556483. The next prime is 31222556587. The reversal of 31222556489 is 98465522213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29419110400 + 1803446089 = 171520^2 + 42467^2 .

It is a cyclic number.

It is not a de Polignac number, because 31222556489 - 2¹⁶ = 31222490953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31222556483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611278244 + 15611278245.

It is an arithmetic number, because the mean of its divisors is an integer number (15611278245).

Almost surely, 2^31222556489 is an apocalyptic number.

It is an amenable number.

31222556489 is a deficient number, since it is larger than the sum of its proper divisors (1).

31222556489 is an equidigital number, since it uses as much as digits as its factorization.

31222556489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 47.

The spelling of 31222556489 in words is "thirty-one billion, two hundred twenty-two million, five hundred fifty-six thousand, four hundred eighty-nine".