31303223143 has 2 divisors, whose sum is σ = 31303223144. Its totient is φ = 31303223142.

The previous prime is 31303223137. The next prime is 31303223191. The reversal of 31303223143 is 34132230313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31303223143 - 2²⁹ = 30766352231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31303223243) 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, 15651611571 + 15651611572.

It is an arithmetic number, because the mean of its divisors is an integer number (15651611572).

Almost surely, 2^31303223143 is an apocalyptic number.

31303223143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303223143 is an equidigital number, since it uses as much as digits as its factorization.

31303223143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 25.

Adding to 31303223143 its reverse (34132230313), we get a palindrome (65435453456).

The spelling of 31303223143 in words is "thirty-one billion, three hundred three million, two hundred twenty-three thousand, one hundred forty-three".