31504505143 has 2 divisors, whose sum is σ = 31504505144. Its totient is φ = 31504505142.

The previous prime is 31504505141. The next prime is 31504505147. The reversal of 31504505143 is 34150540513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31504505143 - 2¹ = 31504505141 is a prime.

Together with 31504505141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31504505141) 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, 15752252571 + 15752252572.

It is an arithmetic number, because the mean of its divisors is an integer number (15752252572).

Almost surely, 2^31504505143 is an apocalyptic number.

31504505143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31504505143 is an equidigital number, since it uses as much as digits as its factorization.

31504505143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 31504505143 in words is "thirty-one billion, five hundred four million, five hundred five thousand, one hundred forty-three".