31443028871 has 2 divisors, whose sum is σ = 31443028872. Its totient is φ = 31443028870.

The previous prime is 31443028849. The next prime is 31443028873. The reversal of 31443028871 is 17882034413.

It is a strong prime.

It is an emirp because it is prime and its reverse (17882034413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31443028871 is a prime.

Together with 31443028873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31443028873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721514435 + 15721514436.

It is an arithmetic number, because the mean of its divisors is an integer number (15721514436).

Almost surely, 2^31443028871 is an apocalyptic number.

31443028871 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443028871 is an equidigital number, since it uses as much as digits as its factorization.

31443028871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 31443028871 in words is "thirty-one billion, four hundred forty-three million, twenty-eight thousand, eight hundred seventy-one".