31440144143 has 2 divisors, whose sum is σ = 31440144144. Its totient is φ = 31440144142.

The previous prime is 31440144133. The next prime is 31440144163. The reversal of 31440144143 is 34144104413.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31440144143 - 2⁶ = 31440144079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440144133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720072071 + 15720072072.

It is an arithmetic number, because the mean of its divisors is an integer number (15720072072).

Almost surely, 2^31440144143 is an apocalyptic number.

31440144143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440144143 is an equidigital number, since it uses as much as digits as its factorization.

31440144143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 31440144143 its reverse (34144104413), we get a palindrome (65584248556).

The spelling of 31440144143 in words is "thirty-one billion, four hundred forty million, one hundred forty-four thousand, one hundred forty-three".