31098322643 has 2 divisors, whose sum is σ = 31098322644. Its totient is φ = 31098322642.

The previous prime is 31098322631. The next prime is 31098322679. The reversal of 31098322643 is 34622389013.

It is a weak prime.

It is an emirp because it is prime and its reverse (34622389013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31098322643 - 2⁴ = 31098322627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31098322643.

It is not a weakly prime, because it can be changed into another prime (31098328643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15549161321 + 15549161322.

It is an arithmetic number, because the mean of its divisors is an integer number (15549161322).

Almost surely, 2^31098322643 is an apocalyptic number.

31098322643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31098322643 is an equidigital number, since it uses as much as digits as its factorization.

31098322643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 31098322643 in words is "thirty-one billion, ninety-eight million, three hundred twenty-two thousand, six hundred forty-three".